Caesar defeats Pharnaces at Zela in Syria and declares, "veni, vidi, vici," (I came, I saw, I conquered).
The Continental Congress, having decided unanimously to make the Declaration of Independence, affixes the signatures of the other delegates to the document.
Napoleon Bonaparte is proclaimed "Consul for Life" by the French Senate after a plebiscite from the French people.
Troops under General Henry Atkinson massacre Sauk Indian men, women and children who are followers of Black Hawk at the Bad Axe River in Wisconsin. Black Hawk himself finally surrenders three weeks later, bringing the Black Hawk War to an end.
Union General John Pope captures Orange Court House, Virginia.
The Army Ambulance Corps is established by Maj. Gen. George McClellan.
Wild Bill Hickok is shot while playing poker.
A British force lands in Archangel, Russia, to support White Russian opposition to the Bolsheviks.
Vice President Calvin Coolidge becomes president upon the death of Warren G. Harding.
German President Paul von Hindenburg dies and Adolf Hitler becomes chancellor.
Lt. John F. Kennedy, towing an injured sailor, swims to a small island in the Solomon Islands. The night before, his boat, PT-109, had been split in half by the Japanese destroyer Amagiri.
The U.S. First Provisional Marine Brigade arrives in Korea from the United States.