- 1240 Mongols under Batu Khan occupy & destroy Kiev
- 1865 13th Amendment of the United States Constitution is ratified, abolishing slavery
- 1877 1st recording made of the human voice made by Thomas Edison reciting "Mary had a little lamb"
- 1921 Anglo-Irish Treaty signed; Ireland receives dominion status; partition creates Northern Ireland
- 1998 Hugo Chávez is elected President of Venezuela
- 2006 NASA reveals photographs taken by Mars Global Surveyor suggesting the presence of liquid water on Mars
1st edition of "Encyclopedia Brittanica" published in Scotland
On December 6, 1768