313 ~ Roman emperor Licinius unified the entire Eastern Roman Empire under his rule.

1777 ~ Birthday of Carl Friedrich Gauss, Mathematician, Astronomer and Physicist.

1803 ~ Louisiana Purchase: The United States purchased the Louisiana Territory from France for $15 million, more than doubling the size of the young nation overnight.

1870 ~ Birthday of Franz Lehár, Composer.

1877 ~ Birthday of Alice B. Toklas, Muse.

1893 ~ Birthday of Joachim von Ribbentrop, Nazi Foreign Minister.

1938 ~ Birthday of Larry Niven, Science Fiction Author.

1945 ~ Adolf Hitler and Eva Braun commited suicide after being married for one day.

1948 ~ The Land Rover unveiled at the Amsterdam Auto Show.

1975 ~ Vietnam War: North Vietnamese troops occupied Saigon, ending the war.

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Eudaimonia