764: Tibetan troops occupy Chang’an for 15 days, capital of the Chinese Tang Dynasty

1927: Leon Trotsky is expelled from the Soviet Communist Party, paving the way for Joseph Stalin to consolidate complete power

1942: WWII Naval Battle of Guadalcanal begins between Allied and Japanese forces in Solomon Islands

1968: US Supreme Court: Epperson v. Arkansas, court declares unconstitutional Arkansas law banning teaching evolution in public schools

1970: Cyclone Bhola makes landfall in East Pakistan (Bangladesh) killing up to 500,000, making it the deadliest tropical cyclone ever recorded

1990: The World Wide Web is first proposed by CERN computer scientists Tim Berners-Lee and Robert Cailliau

Source: Onthisday.com