1789: George Washington took office in New York as the first president of the United States.
1803: The United States purchased the Louisiana Territory from France.
1945: As Russian troops approached his Berlin bunker, Adolf Hitler committed suicide along with his wife of one day, Eva Braun.
1973: President Nixon announced the resignations of his aides H.R. Haldeman and John Ehrlichman, along with Attorney General Richard Kleindienst and White House counsel John Dean.
1975: The South Vietnamese capital of Saigon fell to communist forces.