- 3114 BC The Mesoamerican Long Count calendar, used by several pre-Columbian Mesoamerican civilizations, notably the Mayans, begins
- 1929 Babe Ruth becomes 1st professional baseball player to hit 500 homers (off Willis Hudlin of Cleveland Indians)
- 1945 Allies refuse Japan's surrender offer to retain Emperor Hirohito
- 1954 Formal peace treaty ends over 7 yrs of fighting in Indochina between the French and the Communist Viet Minh
- 1988 Al-Qaeda formed at a meeting between Osama bin Laden, Zawahiri and Dr Fadl in Peshawar, Pakistan
- 2003 NATO takes over command of the peacekeeping force in Afghanistan, marking its first major operation outside Europe in its 54-year-history.
1st televised baseball game in color, on WCBS in New York City (Boston Braves beat the Brooklyn Dodgers 8-1)
On August 11, 1951
During a radio voice test, US President Reagan jokes he "signed legislation that would outlaw Russia forever. We begin bombing in 5 minutes."
On August 11, 1984