284: Roman general Diocletian proclaimed Emperor by armies of the east and west after the death of Carinus at the Battle of the Margus

762: Bögü, Khan of the Uyghurs, conquers Lo-Yang, capital of the Chinese Empire

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

1815: Second Treaty of Paris: France and her allies agree France will pay indemnities after Battle of Waterloo, ending 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