411 BC – Wealthy Athenians overthrew the democratic government of ancient Athens and replaced it with a short-lived oligarchy known as "The Four Hundred".
1856 – Mormon pioneers began leaving Iowa City, Iowa, and headed west for Salt Lake City, Utah, carrying all their possessions in two-wheeled handcarts.
1946 – After King Ananda Mahidol was assassinated, Bhumibol Adulyadej (pictured), the world's longest-reigning current monarch, ascended to the throne of Thailand.
1973 – Secretariat won the Belmont Stakes by 31 lengths, achieving the first American Triple Crown victory in a quarter-century, and lowering the track and world record times for 1½ mile distance races to 2:24.
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