February 6
- 1778 - American Revolutionary War: In Paris the Treaty of Alliance and the Treaty of Amity and Commerce are signed by the United States and France signaling official recognition of the new republic.
- 1806 - Royal Navy victory off Santo Domingo - Battle of San Domingo.
- 1862 - American Civil War: Ulysses S. Grant gives the United States its first victory of the war, by capturing Fort Henry, Tennessee.
- 1899 - Spanish–American War: The Treaty of Paris, a peace treaty between the United States and Spain is ratified by the United States Senate.
- 1922 - The Washington Naval Treaty was signed in Washington, D.C., limiting the naval armaments of United States, Britain, Japan, France, and Italy.
February 6
- 1778 - American Revolutionary War: In Paris the Treaty of Alliance and the Treaty of Amity and Commerce are signed by the United States and France signaling official recognition of the new republic.
- 1806 - Royal Navy victory off Santo Domingo - Battle of San Domingo.
- 1862 - American Civil War: Ulysses S. Grant gives the United States its first victory of the war, by capturing Fort Henry, Tennessee.
- 1899 - Spanish–American War: The Treaty of Paris, a peace treaty between the United States and Spain is ratified by the United States Senate.
- 1922 - The Washington Naval Treaty was signed in Washington, D.C., limiting the naval armaments of United States, Britain, Japan, France, and Italy.