Portal:United States/Anniversaries/December/December 7
- 1776 – Gilbert du Motier, Marquis de Lafayette arranges to enter the American military as a major general.
- 1787 – Delaware becomes the first state to ratify the United States Constitution.
- 1862 – American Civil War: Battle of Prairie Grove, Arkansas.
- 1869 – American outlaw Jesse James commits his first confirmed bank robbery in Gallatin, Missouri.
- 1941 – World War II: Attack on Pearl Harbor – The Imperial Japanese Navy attacks the United States Pacific Fleet and its defending Army Air Forces and Marine air forces at Pearl Harbor, Hawaii, causing a declaration of war upon Japan by the United States.