284: Roman General Diocletian is proclaimed emperor by the armies of the East and West after the death of Carinus at the Battle of the Margus

762: Khan of the Uyghurs, Bögü Qaghan, conquers Luoyang, the capital of the Chinese Empire

1695: Zumbi, the last King of the Quilombo dos Palmares in early Brazil and a former slave, is executed and decapitated, his head displayed on a pike to dispel any legends of his immortality

1815: Second Treaty of Paris: France has its borders reduced to those of 1790 and agrees to pay 700 million francs in indemnities to end the Napoleonic Wars

1945: The Nuremberg war trials begin as 24 Nazi leaders are put on trial before judges representing the victorious Allied powers

1986: World Health Organization announces first global effort to combat AIDS

Source: Onthisday.com