United States Army enlisted rank insignia 1902–1920

The era from 1902 to 1920 was the most complex era for enlisted rank insignia in the United States Army. During that time the army was organized with each branch (cavalry, infantry, artillery, etc.) having its own rank structure. This led to a large number of insignia designs being used.

On July 17, 1902, the army issued General Order 81 prescribing new uniforms. Enlisted chevrons were made smaller and changed to point up. The smaller chevrons were due to the wearing of shirts as outerwear in the warm climates that the army was operating in at the time. The army had allowed chevrons on shirts in July 1898. The large coat chevrons in use at the time did not fit on shirt sleeves so soldiers began to fashion smaller versions of their chevrons. The army gave preliminary approval of smaller chevrons in 1900. The new regulations made the smaller chevrons the standard for all uniforms.

The insignia was to be in the colors of each branch, light blue for infantry, yellow for cavalry, red for artillery, buff for the Quartermaster's Department that included the detachment at West Point, grey for the Subsistence Department, maroon piped with white for the Medical Department, red piped with white for the Corps of Engineers, black piped with red for the Ordnance Department and orange piped with white for the Signal Corps. They would be worn on a background matching the coat. This meant that each design was placed on backgrounds of blue, white, khaki and olive drab. There was also a rust colored fatigue uniform worn by men of the artillery at emplacements. Regulations call for "usual chevrons", which would have meant red on a rust background. It seams in practice the chevrons were brown or tan.

US Army Sergeants' Chevrons 1902

	Quartermaster's Department USMA Detachment	Subsistence Department' (Post Commissary Sergeant)	Medical Department (Acting Hospital Steward)	Corps of Engineers	Ordnance Department	Signal Corps	Cavalry	Corps of Artillery	Infantry
Dress Blue
White
Khaki
Olive Drab
Fatigue

US Army Olive Drab Chevrons 1902

	Regimental Sergeant Major	Sergeant Major Senior Grade	Ordnance Sergeant	Post-Commissary Sergeant	Post Quartermaster Sergeant	Electrician Sergeant	Hospital Steward	Sergeant First Class	Regimental Quartermaster Sergeant	Regimental Commissary Sergeant	Chief Musician	Squadron Sergeant Major	Battalion Sergeant Major	Sergeant Major Junior Grade	Color Sergeant	Chief Trumpeter	Principal Musician	Battalion Quartermaster Sergeant	First Sergeant	Drum Major	Sergeant	Company/Battery/Troop Quartermaster Sergeant	Stable Sergeant	Acting Hospital Steward	Corporal	Cook	Ferrier and Blacksmith	Saddler	Wagoner	Trumpeter	Mechanic	Musician	Artificer	Lance Acting Hospital Steward	Private Serving as Lance Corporal	Private First Class	Private Second Class	Private of the Hospital Corps	Private
Quartermaster's Department
Subsistence Department
Medical Department
Corps of Engineers																																No Insignia							No Insignia
Ordnance Department																																					No Insignia
Signal Corps
Cavalry																													No Insignia	No Insignia									No Insignia
Artillery Corps																																No Insignia							No Insignia
Infantry																																No Insignia							No Insignia
Military Academy Detachment																																No Insignia							No Insignia

On March 2, 1903, the rank structure of the medical department was changed to Sergeant First Class (replacing Hospital Steward), Sergeant (replacing Acting Hospital Steward), Corporal, Lance Corporal (replacing Lance Acting Hospital Steward), Private First Class and Private. Insignia was prescribed on April 28, 1903.

					No Insignia
Sergeant First Class	Sergeant	Corporal	Lance Corporal	Private First Class	Private

On October 1, 1903, the color for infantry was changed from light blue to white.

US Army Olive Drab Chevrons 1903

	Regimental Sergeant Major	Sergeant Major Senior Grade	Ordnance Sergeant	Post-Commissary Sergeant	Post Quartermaster Sergeant	Master Electrician	Electrician Sergeant	Sergeant First Class	Regimental Quartermaster Sergeant	Regimental Commissary Sergeant	Chief Musician	Squadron Sergeant Major	Battalion Sergeant Major	Sergeant Major Junior Grade	Color Sergeant	Chief Trumpeter	Principal Musician	Battalion Quartermaster Sergeant	First Sergeant	Drum Major	Sergeant	Company/Battery/Troop Quartermaster	Stable Sergeant	Corporal	Cook	Ferrier and Blacksmith	Saddler	Wagoner	Trumpeter	Mechanic	Musician	Artificer	Private Serving as Lance Corporal	Private First Class	Private Second Class	Private
Quartermaster's Department
Subsistence Department
Medical Department																																				No Insignia
Corps of Engineers																															No Insignia					No Insignia
Ordnance Department																																			No Insignia	No Insignia
Signal Corps
Cavalry																												No Insignia	No Insignia							No Insignia
Artillery Corps																															No Insignia					No Insignia
Infantry																															No Insignia					No Insignia
Military Academy Detachment																															No Insignia					No Insignia

A rank of Master Signal Electrician was added to the Signal Corps on April 28, 1904. Also on that date a Band Sergeant and Assistant Leader was added to the West Point Band. He probably wore the three chevrons of a sergeant.

New uniform regulations were issued on December 31, 1904 that not only prescribed insignia for Master Signal Electricians but changed the color of all insignia not worn on the dress blue coat. Supplying so many versions of insignia had proved to be difficult and costly. The regulation changed the insignia for the white, khaki and olive drab coats from branch colors to olive drab shirting flannel.

US Army Olive Drab Chevrons 1904–1906

	Regimental Sergeant Major	Sergeant Major Senior Grade	Ordnance Sergeant	Post-Commissary Sergeant	Post Quartermaster Sergeant	Master Electrician	Electrician Sergeant	Sergeant First Class	Master Signal Electrician	Regimental Quartermaster Sergeant	Regimental Commissary Sergeant	Band Sergeant and Assistant Leader	Chief Musician	Squadron Sergeant Major	Battalion Sergeant Major	Sergeant Major Junior Grade	Color Sergeant	Chief Trumpeter	Principal Musician	Battalion Quartermaster Sergeant	First Sergeant	Drum Major	Sergeant	Company/Battery/Troop Quartermaster	Stable Sergeant	Corporal	Cook	Ferrier and Blacksmith	Saddler	Wagoner	Trumpeter	Mechanic	Musician	Artificer	Private Serving as Lance Corporal	Private First Class	Private Second Class	Private
Quartermaster's Department
Subsistence Department
Medical Department																																						No Insignia
Corps of Engineers																																	No Insignia					No Insignia
Ordnance Department																																					No Insignia	No Insignia
Signal Corps
Cavalry																														No Insignia	No Insignia							No Insignia
Artillery Corps																																	No Insignia					No Insignia
Infantry																																	No Insignia					No Insignia
Military Academy Detachment																																	No Insignia					No Insignia

On January 25, 1907, The Corps of Artillery was split into Field Artillery regiments and a Coast Artillery Corps. The regimental structure for the field artillery added the ranks of Regimental Sergeant Major, Regimental Quartermaster Sergeant, Regimental Commissary Sergeant, Battalion Quartermaster Sergeant and Chief Mechanic. In the Coast Artillery Corps the ranks of Master Gunner and Engineer were added and electrician sergeants were split into two classes. Artificers were removed from both organizations.

Insignia was prescribed on August 14, 1907. Engineers wore a governor in a ring and Master Gunners a shell in a wreath. Master electricians now wore lightning in a wreath, Electrician Sergeants First Class three chevrons, one arc and lightning and Electrician Sergeants Second Class three chevrons and lightning.

Master Gunner	Engineer	Master Electrician	Electrician Sergeant First Class	Electrician Sergeant Second Class

US Army Olive Drab Chevrons 1907

	Regimental Sergeant Major	Sergeant Major Senior Grade	Master Electrician	Master Signal Electrician	Engineer	Electrician Sergeant First Class	Ordnance Sergeant	Post-Commissary Sergeant	Post Quartermaster Sergeant	Sergeant First Class	Electrician Sergeant Second Class	Master Gunner	Regimental Quartermaster Sergeant	Regimental Commissary Sergeant	Band Sergeant and Assistant Leader	Chief Musician	Squadron Sergeant Major	Battalion Sergeant Major	Sergeant Major Junior Grade	Color Sergeant	Chief Trumpeter	Principal Musician	Battalion Quartermaster Sergeant	First Sergeant	Drum Major	Sergeant	Company /Batter/Troop Quartermaster Sergeant	Stable Sergeant	Corporal	Fireman	Cook	Ferrier and Blacksmith	Saddler	Wagoner	Trumpeter	Chief Mechanic	Mechanic	Musician	Artificer	Private Serving As Lance Corporal	Private First Class	Private Second Class	Private
Quartermaster's Department
Subsistence Department
Medical Department																																											No Insignia
Corps of Engineers																																						No Insignia				No Insignia	No Insignia
Ordnance Department																																										No Insignia
Signal Corps
Cavalry																																		No Insignia	No Insignia								No Insignia
Field Artillery																																						No Insignia					No Insignia
Coast Artillery Corps																																						No Insignia					No Insignia
Infantry																																						No Insignia					No Insignia
Military Academy																																		No Insignia	No Insignia			No Insignia					No Insignia

Insignia for the coast artillery was changed again on January 18, 1908. Master Gunners now wore a shell in a wreath under a star, Engineers wore the same with a governor instead of a shell and Master Electricians wore the same with lightning. Electrician Sergeants wore three chevrons over a wreath with lightning with first class being denoted by a bar. Firemen now wore one chevron and one arc with a governor.

The background of all private first class style insignia was made round instead of rectangular to save cloth.

Master Gunner	Engineer	Master Electrician	Electrician Sergeant First Class	Electrician Sergeant Second Class	Fireman

US Army Olive Drab Chevrons 1908

	Regimental Sergeant Major	Sergeant Major Senior Grade	Master Electrician	Master Signal Electrician	Engineer	Electrician Sergeant First Class	Ordnance Sergeant	Post-Commissary Sergeant	Post Quartermaster Sergeant	Sergeant First Class	Electrician Sergeant Second Class	Master Gunner	Regimental Quartermaster Sergeant	Regimental Commissary Sergeant	Band Sergeant and Assistant Leader	Chief Musician	Squadron Sergeant Major	Battalion Sergeant Major	Sergeant Major Junior Grade	Color Sergeant	Chief Trumpeter	Principal Musician	Battalion Quartermaster Sergeant	First Sergeant	Drum Major	Sergeant	Company /Batter/Troop Quartermaster Sergeant	Stable Sergeant	Corporal	Fireman	Cook	Ferrier and Blacksmith	Saddler	Wagoner	Trumpeter	Chief Mechanic	Mechanic	Musician	Artificer	Private Serving As Lance Corporal	Private First Class	Private Second Class	Privates
Quartermaster's Department
Subsistence Department
Medical Department																																											No Insignia
Corps of Engineers																																						No Insignia				No Insignia	No Insignia
Ordnance Department																																										No Insignia
Signal Corps
Cavalry																																		No Insignia	No Insignia								No Insignia
Field Artillery																																						No Insignia					No Insignia
Coast Artillery Corps																																						No Insignia					No Insignia
Infantry																																						No Insignia					No Insignia
Military Academy																																		No Insignia	No Insignia			No Insignia					No Insignia

In January 1909 the Band Sergeant and Assistant Leader of the West Point Band and the Sergeant In charge of the West Point field musicians were given distinctive insignia.

On January 22, 1909, Master Signal Electricians were given insignia different from other Master Electricians.

On March 3, 1909, enlisted detachments were added to the army's various service schools.

On June 12, 1909, the rust fatigue uniform was replaced with a uniform made of blue denim.

Insignia for the new uniform was prescribed on November 4, 1909. They were to be of "red washable material placed on a background of blue denim cloth". It seams that in practice the army never found a red washable material that was color fast. Instead the chevrons were just outlines of red stitching.

Band Sergeant and Assistant Leader	Sergeant of Field Music	Master Signal Electrician

US Army Olive Drab Chevrons 1909

	Regimental Sergeant Major	Sergeant Major Senior Grade	Master Electrician	Master Signal Electrician	Engineer	Electrician Sergeant First Class	Ordnance Sergeant	Post-Commissary Sergeant	Post Quartermaster Sergeant	Sergeant First Class	Electrician Sergeant Second Class	Master Gunner	Regimental Quartermaster Sergeant	Regimental Commissary Sergeant	Chief Musician	Squadron Sergeant Major	Battalion Sergeant Major	Sergeant Major Junior Grade	Color Sergeant	Chief Trumpeter	Principal Musician	Battalion Quartermaster Sergeant	First Sergeant	Drum Major	Band Sergeant and Assistant Leader	Sergeant of Field Music	Sergeant	Company /Battery/Troop Quartermaster Sergeant	Stable Sergeant	Corporal	Fireman	Cook	Acting Cook Hospital Corps	Farrier	Horseshoer	Saddler	Wagoner	Trumpeter	Chief Mechanic	Mechanic	Musician	Artificer	Private Serving as Lance Corporal	Private First Class	Private Second Class	Private
Quartermaster's Department
Subsistence Department
Medical Department																																														No Insignia
Corps of Engineers																																									No Insignia				No Insignia	No Insignia
Ordnance Department																																													No Insignia
Signal Corps
Cavalry																																					No Insignia	No Insignia								No Insignia
Field Artillery																																									No Insignia					No Insignia
Coast Artillery Corps																																									No Insignia					No Insignia
Infantry																																									No Insignia					No Insignia
Military Academy																																														No Insignia
Service School Detachments																																														No Insignia

On March 10, 1910, enlisted detachments at service schools were ordered to wear green dress chevrons and the detachment at West Point was ordered to wear green piped with white.

On March 23, 1910, the title of Farrier and Blacksmith was shortened to just Farrier and a rank of Horseshoer was added. Insignia was prescribed on June 13, 1910. Horseshoers would continue the horseshoe of Farriers and Blacksmiths, Farriers would now wear a horse head and insignia for Wagoners was now a wagon wheel.

Horseshoer (Cavalry)	Horseshoer (Field Artillery)	Farrier (Cavalry)	Wagoner (Cavalry)

US Army Olive Drab Chevrons 1910

	Regimental Sergeant Major	Sergeant Major Senior Grade	Master Electrician	Master Signal Electrician	Engineer	Electrician Sergeant First Class	Ordnance Sergeant	Post-Commissary Sergeant	Post Quartermaster Sergeant	Sergeant First Class	Electrician Sergeant Second Class	Master Gunner	Regimental Quartermaster Sergeant	Regimental Commissary Sergeant	Chief Musician	Squadron Sergeant Major	Battalion Sergeant Major	Sergeant Major Junior Grade	Color Sergeant	Chief Trumpeter	Principal Musician	Battalion Quartermaster Sergeant	First Sergeant	Drum Major	Band Sergeant and Assistant Leader	Sergeant of Field Music	Sergeant	Company /Battery/Troop Quartermaster Sergeant	Stable Sergeant	Corporal	Fireman	Cook	Acting Cook Hospital Corps	Farrier	Horseshoer	Saddler	Wagoner	Trumpeter	Chief Mechanic	Mechanic	Musician	Artificer	Private Serving as Lance Corporal	Private First Class	Private Second Class	Private
Quartermaster's Department
Subsistence Department
Medical Department																																														No Insignia
Corps of Engineers																																									No Insignia				No Insignia	No Insignia
Ordnance Department																																													No Insignia
Signal Corps
Cavalry																																						No Insignia								No Insignia
Field Artillery																																									No Insignia					No Insignia
Coast Artillery Corps																																									No Insignia					No Insignia
Infantry																																									No Insignia					No Insignia
Military Academy																																									No Insignia					No Insignia
Service School Detachments																																														No Insignia

New uniform regulations, issued on December 29, 1911, eliminated the khaki uniform and therefore the need for chevrons with a khaki background. Privates of the Signal Corps no longer wore insignia.

US Army Olive Drab Chevrons 1911

	Regimental Sergeant Major	Sergeant Major Senior Grade	Master Electrician	Master Signal Electrician	Engineer	Electrician Sergeant First Class	Ordnance Sergeant	Post-Commissary Sergeant	Post Quartermaster Sergeant	Sergeant First Class	Electrician Sergeant Second Class	Master Gunner	Regimental Quartermaster Sergeant	Regimental Commissary Sergeant	Chief Musician	Squadron Sergeant Major	Battalion Sergeant Major	Sergeant Majors Junior Grade	Color Sergeant	Chief Trumpeter	Principal Musician	Battalion Quartermaster Sergeant	First Sergeant	Drum Major	Band Sergeant and Assistant Leader	Sergeant of Field Music	Sergeant	Company/ Battery/ Troop Quartermaster Sergeant	Stable Sergeant	Corporal	Fireman	Cook	Acting Cook	Farrier	Horseshoer	Saddlers	Wagoner	Trumpeter	Chief Mechanic	Mechanic	Musician	Artificer	Private Serving as Lance Corporal	Private First Class	Private Second Class	Private
Quartermaster's Department
Subsistence Department
Medical Department																																														No Insignia
Corps of Engineers																																									No Insignia				No Insignia	No Insignia
Ordnance Department																																													No Insignia
Signal Corps																																														No Insignia
Cavalry																																						No Insignia								No Insignia
Field Artillery																																									No Insignia					No Insignia
Coast Artillery Corps																																									No Insignia					No Insignia
Infantry																																									No Insignia					No Insignia
Military Academy																																									No Insignia					No Insignia
Service School Detachments																																									No Insignia					No Insignia

On August 24, 1912, the army's Quartermaster, Subsistence and Pay Departments were merged into the Quartermaster Corps. The new corps contained the enlisted ranks of Master Electrician, Quartermaster Sergeant, Quartermaster Corps, Sergeant First Class, Sergeant, Corporal, Cook, Private First Class and Private. The old ranks of Post Quartermaster Sergeant and Post Commissary Sergeant were eliminated.

It is not clear when insignia was prescribed.

						No Insignia
Master Electrician Quartermaster Corps	Quartermaster Sergeant, Quartermaster Corps	Sergeant Quartermaster Corps	CorporalQuartermaster Corps	Cook, Quartermaster Corps	Private First ClassQuartermaster Corps	Private Quartermaster Corps

US Army Olive Drab Chevrons 1912

	Regimental Sergeant Major	Sergeant Major Senior Grade	Master Electrician	Master Signal Electrician	Engineer	Electrician Sergeant First Class	Ordnance Sergeant	Quartermaster Sergeant, Quartermaster Corps	Sergeant First Class	Electrician Sergeant Second Class	Master Gunner	Regimental Quartermaster Sergeant	Regimental Commissary Sergeant	Chief Musician	Squadron Sergeant Major	Battalion Sergeant Major	Sergeant Major Junior Grade	Color Sergeant	Chief Trumpeter	Principal Musician	Battalion Quartermaster Sergeant	First Sergeant	Drum Major	Band Sergeant and Assistant Leader	Sergeant of Field Music	Sergeant	Company/Battery/Troop Quartermaster Sergeant	Stable Sergeant	Corporal	Fireman	Cook	Acting Cook	Ferrier	Horseshoer	Saddler	Wagoner	Trumpeter	Chief Mechanic	Mechanic	Musician	Artificer	Private Serving as Lance Corporal	Private First Class	Private Second Class	Privates
Quartermaster Corps																																													No Insignia
Medical Department																																													No Insignia
Corps of Engineers																																								No Insignia				No Insignia	No Insignia
Ordnance Department																																												No Insignia
Signal Corps																																													No Insignia
Cavalry																																					No Insignia								No Insignia
Field Artillery																																								No Insignia					No Insignia
Coast Artillery Corps																																								No Insignia					No Insignia
Infantry																																								No Insignia					No Insignia
Military Academy																																								No Insignia					No Insignia
Service School Detachments																																													No Insignia

In 1913 the denim chevrons were extended to the Quartermaster's Department.

US Army Olive Drab Chevrons 1913

	Regimental Sergeant Major	Sergeant Major Senior Grade	Master Electrician	Master Signal Electrician	Engineer	Electrician Sergeant First Class	Ordnance Sergeant	Quartermaster Sergeant, Quartermaster Corps	Sergeant First Class	Electrician Sergeant Second Class	Master Gunner	Regimental Quartermaster Sergeant	Regimental Commissary Sergeant	Chief Musician	Squadron Sergeant Major	Battalion Sergeant Major	Sergeant Major Junior Grade	Color Sergeant	Chief Trumpeter	Principal Musician	Battalion Quartermaster Sergeant	First Sergeant	Drum Major	Band Sergeant and Assistant Leader	Sergeant of Field Music	Sergeant	Company/Battery/Troop Quartermaster Sergeant	Stable Sergeant	Corporal	Fireman	Cook	Acting Cook	Ferrier	Horseshoer	Saddler	Wagoner	Trumpeter	Chief Mechanic	Mechanic	Musician	Artificer	Private Serving as Lance Corporal	Private First Class	Private Second Class	Privates
Quartermaster Corps																																													No Insignia
Medical Department																																													No Insignia
Corps of Engineers																																								No Insignia				No Insignia	No Insignia
Ordnance Department																																												No Insignia
Signal Corps																																													No Insignia
Cavalry																																					No Insignia								No Insignia
Field Artillery																																								No Insignia					No Insignia
Coast Artillery Corps																																								No Insignia					No Insignia
Infantry																																								No Insignia					No Insignia
Military Academy																																					No Insignia			No Insignia					No Insignia
Service School Detachments																																													No Insignia

In 1914 the insignia for Firemen was changed to three chevrons, one arc and a governor.

Fireman

Denim chevrons were authorized for the Signal Corps.

US Army Olive Drab Chevrons 1914

	Regimental Sergeant Major	Sergeant Major Senior Grade	Master Electrician	Master Signal Electrician	Engineer	Electrician Sergeant First Class	Ordnance Sergeant	Quartermaster Sergeant, Quartermaster Corps	Sergeant First Class	Electrician Sergeant Second Class	Master Gunner	Regimental Quartermaster Sergeant	Regimental Commissary Sergeant	Chief Musician	Squadron Sergeant Major	Battalion Sergeant Major	Sergeant Major Junior Grade	Color Sergeant	Chief Trumpeter	Principal Musician	Battalion Quartermaster Sergeant	First Sergeant	Drum Major	Band Sergeant and Assistant Leader	Sergeant of Field Music	Sergeant	Company/Battery/Troop Quartermaster Sergeant	Stable Sergeant	Corporal	Fireman	Cook	Acting Cook	Ferrier	Horseshoer	Saddler	Wagoner	Trumpeter	Chief Mechanic	Mechanic	Musician	Artificer	Private Serving as Lance Corporal	Private First Class	Private Second Class	Private
Quartermaster Corps																																													No Insignia
Medical Department																																													No Insignia
Corps of Engineers																																								No Insignia				No Insignia	No Insignia
Ordnance Department																																												No Insignia
Signal Corps																																													No Insignia
Cavalry																																					No Insignia								No Insignia
Field Artillery																																								No Insignia					No Insignia
Coast Artillery Corps																																								No Insignia					No Insignia
Infantry																																								No Insignia					No Insignia
Military Academy																																								No Insignia					No Insignia
Service School Detachments																																													No Insignia

US Army Olive Drab Chevrons 1915

	Regimental Sergeant Major	Sergeant Major Senior Grade	Master Electrician	Master Signal Electrician	Engineer	Electrician Sergeant First Class	Ordnance Sergeant	Quartermaster Sergeant, Quartermaster Corps	Sergeant First Class	Electrician Sergeant Second Class	Master Gunner	Regimental Quartermaster Sergeant	Regimental Commissary Sergeant	Chief Musician	Squadron Sergeant Major	Battalion Sergeant Major	Sergeant Major Junior Grade	Color Sergeant	Chief Trumpeter	Principal Musician	Battalion Quartermaster Sergeant	First Sergeant	Drum Major	Band Sergeant and Assistant Leader	Sergeant of Field Music	Sergeant	Company/Battery/Troop Quartermaster Sergeant	Stable Sergeant	Corporal	Fireman	Cook	Acting Cook	Ferrier	Horseshoer	Saddler	Wagoner	Trumpeter	Chief Mechanic	Mechanic	Musician	Artificer	Private Serving as Lance Corporal	Private First Class	Private Second Class	Privates
Quartermaster Corps																																													No Insignia
Medical Department																																													No Insignia
Corps of Engineers																																								No Insignia				No Insignia	No Insignia
Ordnance Department																																												No Insignia
Signal Corps																																													No Insignia
Cavalry																																					No Insignia								No Insignia
Field Artillery																																								No Insignia					No Insignia
Coast Artillery Corps																																								No Insignia					No Insignia
Infantry																																								No Insignia					No Insignia
Military Academy																																								No Insignia					No Insignia
Service School Detachments																																								No Insignia					No Insignia

The army was reorganized by the National Defense Act of June 3, 1916.

Regimental Quartermaster Sergeants became Regimental Supply Sergeants. Battalion Quartermaster Sergeants in the Corps of Engineers became Battalion Supply Sergeants, those in the field artillery were abolished.  Company level Quartermaster Sergeants became Supply Sergeants.  Regimental Commissary Sergeants were abolished.  

Artificers in the infantry were converted to mechanics and they were added to the cavalry and Medical Department.  

Bands in the infantry, cavalry, field artillery, Coast Artillery Corps and the Corps of Engineers were reorganized.  This eliminated the ranks of Chief Musician, Chief Trumpeter, Principal Musician and Drum Major.  They were replaced with the ranks of Band Leader, Assistant Band Leader, Band Sergeant and Band Corporal.  The First Sergeant of the headquarters company or troop in the infantry and cavalry served as drum major.  Band musicians were divided into three classes.  Musicians and Trumpeters in field units became Buglers.  A rank of Sergeant Bugler was added to the infantry, cavalry field artillery and engineers.

					No Insignia	No Insignia	No Insignia		No Insignia
Band Leader Infantry	Assistant Band Leader Infantry	First Sergeant Drum Major Infantry	Band Sergeant Infantry	Band Corporal Infantry	Musician First Class Infantry	Musician Second Class Infantry	Musician Third Class Infantry	Sergeant Bugler Infantry	Bugler Infantry
					No Insignia	No Insignia	No Insignia		No Insignia
Band Leader Cavalry	Assistant Band Leader Cavalry	First Sergeant Drum Major Cavalry	Band Sergeant Cavalry	Band Corporal Cavalry	Musician First Class Cavalry	Musician Second Class Cavalry	Musician Third Class Cavalry	Sergeant Bugler Cavalry	Bugler Cavalry
					No Insignia	No Insignia	No Insignia		No Insignia
Band Leader Coast Artillery Corps	Assistant Band Leader Coast Artillery Corps		Band Sergeant Coast Artillery Corps	Band Corporal Coast Artillery Corps	Musician First Class Coast Artillery Corps	Musician Second Class Coast Artillery Corps	Musician Third Class Coast Artillery Corps	Sergeant Bugler Coast Artillery Corps	Bugler Coast Artillery Corps
					No Insignia	No Insignia	No Insignia		No Insignia
Band Leader Field Artillery	Assistant Band Leader Field Artillery		Band Sergeant Field Artillery	Band Corporal Field Artillery	Musician First Class Field Artillery	Musician Second Class Field Artillery	Musician Third Class Field Artillery	Sergeant Bugler Field Artillery	Bugler Field Artillery
					No Insignia	No Insignia	No Insignia		No Insignia
Band Leader Corps of Engineers	Assistant Band Leader Corps of Engineers		Band Sergeant Corps of Engineers	Band Corporal Corps of Engineers	Musician First Class Corps of Engineers	Musician Second Class Corps of Engineers	Musician Third Class Corps of Engineers	Sergeant Bugler Corps of Engineers	Bugler Corps of Engineers

Farriers were eliminated from the cavalry and field artillery but were added to the Medical Department.  Saddlers and Wagoners were authorized for the infantry and field artillery.  Stable Sergeants were authorized in the infantry and field artillery. Horseshoers were authorized in the infantry.

A new rank of Mess Sergeant was authorized in the cavalry, infantry, field artillery, Coast Artillery Corps and the Corps of Engineers.

Mess Sergeant Infantry	Mess Sergeant Cavalry	Mess Sergeant Field Artillery	Mess Sergeant Coast Artillery Corps	Mess Sergeant Infantry Corps of Engineers

Master Electricians in the Quartermaster Corps were replaced with Quartermaster Sergeants Senior Grade.

Quartermaster Sergeant Senior Grade Quartermaster Corps

The Medical Department added the new ranks of Master Hospital Sergeant and Hospital Sergeant and was authorized the ranks of horseshoer and saddler.

The Corps of Engineers added the new ranks of Master Engineer Senior Grade and Master Engineer Junior Grade. The Corps of Engineers was also now authorized the ranks of Regimental Sergeant Major, Color Sergeant, Stable Sergeant, Sergeant First Class, Horseshoer, Saddler and Wagoner.  The rank of Private Second Class was eliminated.

Master Engineer Senior Grade Corps of Engineers	Master Engineer Junior Grade Corps of Engineers	Sergeant First Class Corps of Engineers

The Coast Artillery Corp added the new ranks of Assistant Engineer and Radio Sergeant.

Assistant Engineer Coast Artillery Corps	Radio Sergeant Coast Artillery Corps

The Signal Corps added the new rank of Aviator and were authorized Horseshoers.

Aviator Signal Corps

The rank of Private First Class was added to the infantry, cavalry, field artillery and Coast Artillery Corps.  This eliminated the need for privates to serve as Lance Corporals. The only Lance Corporals left were in the West Point service detachment.

Private First Class Infantry	Private First ClassCavalry	Private First Class Field Artillery	Private First Class Coast Artillery Corps

Insignia was probably prescribed by Change No. 6 to Uniform Specifications on October 12, 1916.

US Army Olive Drab Chevrons 1916

	Aviator	Regimental Sergeant Major	Sergeant Major, Senior Grade	Quartermaster Sergeant, Senior Grade, Quartermaster Corps	Master Hospital Sergeant	Master Engineer Senior Grade	Master Electrician	Master Signal Electrician	Band Leader	Hospital Sergeant	Master Engineer Junior Grade	Engineer	Ordnance Sergeant	Quartermaster Sergeant, Quartermaster Corps	Regimental Supply Sergeant	Squadron /Battalion Sergeant Major	Sergeant Major Junior Grade	Supply Sergeant, Battalion	First Sergeant	First Sergeant (Drum Major)	Sergeant First Class	Electrician Sergeant First Class	Assistant Engineer	Master Gunner	Band Sergeant and Assistant Leader, United States Military Academy Band	Assistant Band Leader	Sergeant Bugler	Electrician Sergeant Second Class	Radio Sergeant	Color Sergeant	Sergeant	Supply Sergeant	Mess Sergeant	Stable Sergeant	Fireman	Corporal	Band Corporal	Cook	Farrier	Horseshoer	Saddler	Wagoner	Bugler	Chief Mechanic	Mechanic	Musician First Class	Musician Second Class	Musician Third Class	Private Serving as Lance Corporal	Private First Class Class	Private Second Class	Private
Quartermaster Corps																																																				No Insignia
Medical Department																																																				No Insignia
Corps of Engineers																																											No Insignia			No Insignia	No Insignia	No Insignia				No Insignia
Ordnance Department																																																			No Insignia
Signal Corps																																																				No Insignia
Cavalry																																											No Insignia			No Insignia	No Insignia	No Insignia				No Insignia
Field Artillery																																											No Insignia			No Insignia	No Insignia	No Insignia				No Insignia
Coast Artillery Corps																																											No Insignia			No Insignia	No Insignia	No Insignia				No Insignia
Infantry																																											No Insignia			No Insignia	No Insignia	No Insignia				No Insignia
Military Academy																																														No Insignia	No Insignia	No Insignia				No Insignia
Service School Detachments																																											No Insignia									No Insignia

The entry of the United States into the First World War had a great effect on the army's structure and insignia.

The insignia for Firemen of the Coast Artillery Corps was changed to an arc under a governor.

On April 12, 1917, use of the dress blue uniform was suspended. This left only the olive drab chevrons and the medical white chevrons.

On May 18, 1917, the President was given the authority to reorganize the army as was necessary in order to prosecute the war.

On July 5, 1917, a Gas Service was established. A table in the annual report of the chief of the service states that the ranks used in 1917 were Sergeant First Class, Sergeant, Corporal and Private First Class.

On July 14, 1917, the authority was used to create a Corps of Interpreters. It appears the only enlisted men in the corps were sergeants.

On July 24, 1917, the ranks of Chauffeur First Class and Chauffeur were added to the Signal Corps by law.

On August 6, 1917, Sergeants First Class were added to the Ordnance Department.

A Corps of Intelligence Police was created on August 13, 1917, once again it appears the only enlisted men were sergeants.

Insignia was prescribed on December 29, 1917. Sergeants First Class of the Ordnance Department were given three chevrons, one tie and a bursting bomb. Chauffeurs are not mentioned. The insignia for Band Leaders was changed to three chevrons, three arcs and a lyre. Assistant Band Leaders wore two arcs and Sergeant Buglers one arc. Lyres were placed under the chevrons of Band Sergeants and Band Corporals, and musicians wore the lyre by itself. Buglers wore a bugle.

Insignia for a Tank "Service" is prescribed by the change, but it appears the Tank Corps was not organized until the following year.

US Army Olive Drab Chevrons 1917

	Aviator	Regimental Sergeant Major	Sergeant Major, Senior Grade	Quartermaster Sergeant, Senior Grade, Quartermaster Corps	Master Hospital Sergeant	Master Engineer Senior Grade	Master Electrician	Master Signal Electrician	Band Leader	Hospital Sergeant	Master Engineer Junior Grade	Engineer	Ordnance Sergeant	Quartermaster Sergeant, Quartermaster Corps	Regimental Supply Sergeant	Squadron /Battalion Sergeant Major	Sergeant Major Junior Grade	Supply Sergeant, Battalion	First Sergeant	First Sergeant (Drum Major)	Sergeant First Class	Chauffeur First Class	Electrician Sergeant First Class	Assistant Engineer	Master Gunner	Band Sergeant and Assistant Leader, United States Military Academy Band	Assistant Band Leader	Sergeant Bugler	Electrician Sergeant Second Class	Radio Sergeant	Color Sergeant	Sergeant	Chauffeur	Supply Sergeant	Mess Sergeant	Stable Sergeant	Fireman	Corporal	Band Corporal	Cook	Farrier	Horseshoer	Saddler	Wagoner	Bugler	Chief Mechanic	Mechanic	Musician First Class	Musician Second Class	Musician Third Class	Private Serving as Lance Corporal	Private First Class Class	Private Second Class	Private
Quartermaster Corps																																																						No Insignia
Medical Department																																																						No Insignia
Corps of Engineers																																																						No Insignia
Ordnance Department																																																					No Insignia
Signal Corps																						No Insignia											No Insignia																					No Insignia
Gas Service
Corps of Intelligence Police
Corps of Interpreters
Cavalry																																																						No Insignia
Field Artillery																																																						No Insignia
Coast Artillery Corps																																																						No Insignia
Infantry																																																						No Insignia
Military Academy																																																						No Insignia
Service School Detachments																																																						No Insignia

The Tank Corps was created at some point in early 1918. It contained the enlisted ranks of Master Engineer Senior Grade, Sergeant First Class, Sergeant, Corporal, Cook, Private First Class and Private.

On February 19, 1918, regulations finally acknowledged that denim chevrons were stitched.

In April the olive drab chevrons were prescribed for the medical white uniform.

On May 7, 1918, the army issued Change No. 4 to Special Regulation 42 (Uniform Specifications). Unlike earlier versions, insignia is prescribed for "General Application" instead of branch by branch. The biggest change is the elimination of branch specific insignia for Sergeants First Class, Sergeants and Corporals. Any branch insignia worn under the chevrons was to be removed. Supply Sergeants were to add a tie to their chevrons, returning them to the insignia they wore when they were Company Quartermaster Sergeants. Mess Sergeants added a cooks cap under their chevrons, and stable sergeants regained the horses head they had lost in 1916. Band Leaders now wore a lyre in a wreath under a star and Assistant Band Leaders wore the same without the star. Corporal Buglers wore two chevrons and a bugle and Buglers First Class a bugle over a bar, despite it being two months before those ranks were created. Electrician Sergeants of both classes replaced their wreaths with arcs and Radio Sergeants lost their arc. Hospital Sergeants now wore a caduceus in a wreath. Chief Mechanics replaced the wreath with a bar. Ordnance Sergeants now wore a bursting bomb in a wreath. Master Signal Electricians now wore the full insignia of the corps in a wreath under a star. Privates First Class at West Point and at service schools now wore a hammer crossed with a quill, those at general headquarters a wreath and those in the General Recruiting Service a shield. Quartermaster Sergeants, Quartermaster Corps now wore the corps insignia in a wreath.

Insignia was prescribed for chauffeurs of a car tire and wheel over an arc for Chauffeurs First Class and over a bar for Chauffeurs. The wheel by itself was to be worn by Assistant Chauffeurs and under three chevrons by Motor Sergeants. There was a bill before congress that would have created the ranks of Assistant Chauffeur and Motor Sergeant and just as insignia was prescribed for Corporal Buglers and Buglers First Class the order may have been anticipating this bill. The bill did not pass. Change 4 does state " Chauffeurs may be in any arm of the Service . See Tables of Organization ". A check of the Tables of Organization shows that Chauffeur was a duty assignment of a Private First Class, and Assistant Chauffeur of Privates in division trains and units of the Coast Artillery Corps. They are listed as Privates First Class or Privates with chauffeur duties marked by a footnote. Chauffeur First Class and Chauffeur are shown as ranks in Signal Corps Units.

The Tank Corps insignia was to be a tank. Three different designs of tank were used at various times during the war.

Master Engineer Senior Grade	Private First Class

On May 24, 1918, the Aviation Section of the Signal Corps was separated into the Air Service.

On June 28, 1918, the Gas Service became the Chemical Warfare Service. As of July 13, 1918 the authorized enlisted ranks were Master Engineer Senior Grade, Master Engineer Junior Grade, Regimental Sergeant Major, Regimental Supply Sergeant, Battalion Sergeant Major, Battalion Supply Sergeant, First Sergeant, Sergeant First Class, Mess Sergeant, Supply Sergeant, Sergeant, Corporal, Bugler, Cook, Mechanic, Wagoner, Private First Class and Private. Stable Sergeants, Horseshoers and Saddlers were added on October 30, 1918. Not on this list is the rank of Master Chemical Sergeant that has been listed among the ranks of the service. There are no contemporary references to such a rank. It may have been confused with Senior Engineer Senior Grade.

On July 9, 1918, a Mine Planter Service was added to the Coast Artillery Corps. Its purpose was to lay sea mines, therefore crews for boats had to be provided. This added the nautical ranks of Oiler, Deckhand, Steward and Assistant Steward to the Army. The same law added the ranks of Corporal Bugler and Bugler First Class to the Corps of Engineers, cavalry, infantry, field artillery and Coast Artillery Corps.

Enlisted men were added to the Judge Advocate General's Department on July 12, 1918. Enlisted ranks of Regimental Sergeant Major, Battalion Sergeant Major, Sergeant and Corporal were authorized.

On August 14, 1918, chevrons were restricted to the right sleeve only.

On August 15, 1918, a Motor Transport Corps was added. Enlisted ranks authorized were Master Engineer Senior Grade, First Sergeant, Sergeant First Class, Sergeant, Corporal, Cook, Private First Class and Private.

US Army Olive Drab Chevrons 1918

	Aviator	Regimental Sergeant Major	Sergeant Major Senior Grade	Quartermaster Sergeant, Senior Grade	Master Hospital Sergeant	Master Engineer Senior Grade	Master Electrician	Master signal Electrician	Band Leader	Hospital Sergeant	Master Engineer Junior Grade	Engineer	Ordnance Sergeant	Quartermaster Sergeant, Quartermaster Corps	Supply Sergeant, Regimental	Battalion Sergeant Major	Sergeant Major Junior Grade	Supply Sergeant, Battalion	First Sergeant	First Sergeant (Drum Major)	Sergeant First Class	Chauffeur first Class	Electrician Sergeant First Class	Assistant Engineer	Master Gunner	Band sergeant and assistant leader	Assistant Band Leader	Sergeant Bugler	Oiler, Mine Planter Service	Steward, Mine Planter Service	Electrician Sergeant Second Class	Radio Sergeant	Color Sergeant	Sergeant	Chauffeur	Supply Sergeant	Mess Sergeant	Stable Sergeant	Sergeant of Field Music	Band Sergeant	Fireman	Fireman, Mine Planter Service	Corporal	Corporal Bugler	Band Corporal	Cook	Farrier	Horseshoer	Saddler	Wagoner	Chief Mechanic	Mechanic	Assistant Steward, Mine Planter Service	Bugler First Class	Bugler	Private serving as Lance Corporal	Assistant Chauffeur	Musician First Class	Musician Second Class	Musician Third Class	Deckhand, Mine Planter Service	Private First Class	Private Second Class	Private
General Headquarters																																																																No Insignia
Judge Advocate General's Department
Quartermaster Corps																																																																No Insignia
Medical Department																																																																No Insignia
Corps of Engineers																																																																No Insignia
Chemical Warfare Service																																																																No Insignia
Ordnance Department																																																															No Insignia
Signal corps																																																																No Insignia
Air Service																																																																No Insignia
Tank Corps																																																																No Insignia
Motor Transport Corps																																																																No Insignia
Corps of Intelligence Police
Corps of Interpreters
Cavalry																																																																No Insignia
Field Artillery																																																																No Insignia
Coast Artillery Corps																													No Insignia	No Insignia												No Insignia											No Insignia								No Insignia			No Insignia
Infantry																																																																No Insignia
Military Academy																																																																No Insignia
General Recruiting Service
Service School Detachments																																																																No Insignia

On January 25, 1919, insignia was prescribed for the Transportation Corps and the Provost Marshal General's Department. Both had existed during the war as departments in the American Expeditionary Force in Europe, but never had been authorized their own insignia. The structure of the military police companies and headquarters in the Provost Marshall's Department was laid out by A.E.F. General Order 180, on October 15, 1918.

Private First Class Transportation Corps January 25, 1919 to July 26, 1919	Private First Class Provost Marshal General's January 25, 1919 to July 26, 1919

Also in January insignia was prescribed for the Coast Artillery Corps' Mine Planter Service. Oiler's would wear three chevrons and one arc with a three bladed propeller. Firemen would be the same without the arc. Stewards would wear three chevrons and one arc with a red crescent and assistant stewards just the crescent. Deckhands would wear a red sea mine until September when they were given the insignia of a Private First Class.

Deckhand, Mine Planter Service January to September 1919

On July 26, 1919, an arc was prescribed for Privates First Class of all branches.

US Army Olive Drab Chevrons 1919

	Aviator	Regimental Sergeant Major	Sergeant Major Senior Grade	Quartermaster Sergeant, Senior Grade	Master Hospital Sergeant	Master Engineer Senior Grade	Master Electrician	Master signal Electrician	Band Leader	Hospital Sergeant	Master Engineer Junior Grade	Engineer	Ordnance Sergeant	Quartermaster Sergeant, Quartermaster Corps	Supply Sergeant, Regimental	Battalion Sergeant Major	Sergeant Major Junior Grade	Supply Sergeant, Battalion	First Sergeant	First Sergeant (Drum Major)	Sergeant First Class	Chauffeur first Class	Electrician Sergeant First Class	Assistant Engineer	Master Gunner	Band sergeant and assistant leader	Assistant Band Leader	Sergeant Bugler	Oiler, Mine Planter Service	Steward, Mine Planter Service	Electrician Sergeant Second Class	Radio Sergeant	Color Sergeant	Sergeant	Chauffeur	Supply Sergeant	Mess Sergeant	Stable Sergeant	Sergeant of Field Music	Band Sergeant	Fireman	Fireman, Mine Planter Service	Corporal	Corporal Bugler	Band Corporal	Cook	Farrier	Horseshoer	Saddler	Wagoner	Chief Mechanic	Mechanic	Assistant Steward, Mine Planter Service	Bugler First Class	Bugle	Private serving as Lance Corporal	Assistant Chauffeur	Musician First Class	Musician Second Class	Musician Third Class	Deckhand, Mine Planter Service	Private First Class	Private Second Class	Private
General Headquarters																																																																No Insignia
Judge Advocate General's Department
Quartermaster Corps																																																																No Insignia
Medical Department																																																																No Insignia
Corps of Engineers																																																																No Insignia
Chemical Warfare Service																																																																No Insignia
Ordnance Department																																																															No Insignia
Signal corps																																																																No Insignia
Air Service																																																																No Insignia
Tank Corps																																																																No Insignia
Motor Transport Corps																																																																No Insignia
Transportation Corp																																																																No Insignia
Provost Marshal General's Department
Corps of Intelligence Police
Corps of Interpreters
Cavalry																																																																No Insignia
Field Artillery																																																																No Insignia
Coast Artillery Corps																																																																No Insignia
Infantry																																																																No Insignia
Military Academy																																																																No Insignia
General Recruiting Service
Service School Detachments																																																																No Insignia

On January 6, 1920, color was added to several chevrons. The wreaths used by several senior N.C.O ranks were made green and stars white. The lightning of Master Electricians and electrician sergeants was also made white. The lyres for all levels of musician were made yellow. The caduceus for senior medical N.C.O.s was made maroon. The bursting bomb for Ordnance Sergeants was made black with red flames. The shell for Master Gunners and the Governor for engineers in the Coast Artillery Corps were made red. A new insignia was introduced for Quartermaster Sergeants and Master Engineers. Quartermaster sergeants wore a buff colored key crossed with a sword under a white, navy petty officer's eagle, in a green wreath. Engineers wore the same replacing the key and sword with a red wheel. Senior grades added a white star.

None of these new insignias was ever issued. On June 4, 1920 the structure of the army was changed. Enlisted ranks would be in seven grades and no longer be divided by branch.

US Army Olive Drab Chevrons 1920

	Aviator	Regimental Sergeant Major	Sergeant Major Senior Grade	Quartermaster Sergeant, Senior Grade	Master Hospital Sergeant	Master Engineer Senior Grade	Master Electrician	Master signal Electrician	Band Leader	Hospital Sergeant	Master Engineer Junior Grade	Engineer	Ordnance Sergeant	Quartermaster Sergeant, Quartermaster Corps	Supply Sergeant, Regimental	Battalion Sergeant Major	Sergeant Major Junior Grade	Supply Sergeant, Battalion	First Sergeant	First Sergeant (Drum Major)	Sergeant First Class	Chauffeur first Class	Electrician Sergeant First Class	Assistant Engineer	Master Gunner	Band sergeant and assistant leader	Assistant Band Leader	Sergeant Bugler	Oiler, Mine Planter Service	Steward, Mine Planter Service	Electrician Sergeant Second Class	Radio Sergeant	Color Sergeant	Sergeant	Chauffeur	Supply Sergeant	Mess Sergeant	Stable Sergeant	Sergeant of Field Music	Band Sergeant	Fireman	Fireman, Mine Planter Service	Corporal	Corporal Bugler	Band Corporal	Cook	Farrier	Horseshoer	Saddler	Wagoner	Chief Mechanic	Mechanic	Assistant Steward, Mine Planter Service	Bugler First Class	Bugler	Private serving as Lance Corporal	Assistant Chauffeur	Musician First Class	Musician Second Class	Musician Third Class	Deckhand, Mine Planter Service	Private First Class	Private Second Class	Private
General Headquarters																																																																No Insignia
Judge Advocate General's Department
Quartermaster Corps																																																																No Insignia
Medical Department																																																																No Insignia
Corps of Engineers																																																																No Insignia
Chemical Warfare Service																																																																No Insignia
Ordnance Department																																																															No Insignia
Signal corps																																																																No Insignia
Air Service																																																																No Insignia
Tank Corps																																																																No Insignia
Motor Transport Corps																																																																No Insignia
Transportation Corp																																																																No Insignia
Corps of Intelligence Police
Corps of Interpreters
Cavalry																																																																No Insignia
Field Artillery																																																																No Insignia
Coast Artillery Corps																																																																No Insignia
Infantry																																																																No Insignia
Military Academy																																																																No Insignia
General Recruiting Service
Service School Detachments																																																																No Insignia

The army implemented the new law on June 19, 1920. The new executive authority was used to reduce the large number of ranks in use at the time to eight, plus the specialists.

Grade One was now the rank of Master Sergeant. It was created from the ranks of Regimental Sergeant Major. Sergeant Major Senior Grade, Quartermaster Sergeant Senior Grade, Master Hospital Sergeant, Master Engineer Senior Grade, Master Electrician, Master Signal Electrician, Engineer, Regimental Supply Sergeant, the senior 25% of Ordnance Sergeants, the senior 50% of Master Gunners and the Band Sergeants and Assistant Band Leader of the West Point Band.

Grade Two was now the rank of Technical Sergeant. It came from the ranks of Hospital Sergeant, Master Engineer Junior Grade, the junior 75% of Ordnance Sergeants, Electrician Sergeant First Class, Assistant Engineer, Quartermaster Sergeant and Electrician Sergeants from the Artillery School at West Point. Also in Grade Two the rank of First Sergeant was continued.

Grade Three was now the rank of Staff Sergeant. It came from the ranks ofSquadron or Battalion Sergeant Major, Squadron or Battalion Supply Sergeant, Sergeant Major Junior Grade, Sergeant First Class, the junior 50% of Master Gunners, Assistant Band Leader except from the West Point Band, Sergeant Bugler, Electrician Sergeant, Radio Sergeant, Color Sergeant and Sergeant of Field Music from the West Point Band.

The rank of Sergeant was placed in Grade Four. It absorbed the ranks of Band Sergeant, Stable Sergeant, Mess Sergeant and Supply Sergeant.

The rank of Corporal was placed in Grade Five. It absorbed the ranks of Band Corporal and Corporal Bugler.

The rank of Private First Class was placed in Grade Six, and the rank of Private was placed in grade seven. Within those two grades Musicians First Class in the West Point Band were rated as Specialists First Class. Oilers in the Mine Planter Service were rated as Specialists Second Class. Stewards and Firemen in the Mine Planter Service, Musicians Second Class in the West Point Band and all other Musicians First Class were rated as Specialists Third Class. Chief Mechanics, Horseshoers, Cooks, Musicians Third Class in the West Point Band and all other Musicians Second Class were rated as Specialists Fourth Class. Chauffeurs First Class, Chauffeurs, all other Musicians Third Class, Saddlers, Assistant Stewards and Deck Hands in the Mine Planter Service, Mechanics and Wagoners were rated as Specialists Fifth Class. Buglers First Class and Buglers were rated as Specialists Sixth Class. The ranks of Farrier and Aviator are not listed in the order.

The new ranks were shown by olive drab chevrons on a dark blue background. Master Sergeant's wore three chevrons and three arcs, Technical Sergeants three chevrons and two arcs, First Sergeants three chevrons two arcs and the traditional lozenge, Staff Sergeants three chevrons and one arc, Sergeants three chevrons, Corporals two and Privates First Class one. They were worn on the left sleeve until 1921 when they were placed on both sleeves.

Specialists were to wear the insignia of their grade, one chevron for Grade six or none for Grade Seven. Unofficially many specialists, at least in Grade Six wore one chevron with branch insignia in the angle and one to six arcs.