284: Roman soldier Diocletian proclaimed Emperor by the army

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

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

Source: Onthisday.com