Category:Army units and formations of World War I

• Brigades of World War I (5 C, 1 P)
• Corps of World War I (6 C, 3 P)
• Army groups of World War I (3 C, 4 P)

A

• Army units and formations of Australia in World War I (3 C, 1 P)
• Army units and formations of Austria-Hungary in World War I (2 C, 4 P)

B

• Military units and formations of the British Army in World War I (15 C, 40 P)

C

• Army units and formations of Canada in World War I (4 C, 11 P)

F

• Army units and formations of France in World War I (4 C)

G

• Army units and formations of Germany in World War I (2 C, 1 P)

U

• Army units and formations of the United States in World War I (5 C, 13 P)