The British Army defeated Irish rebels at the Battle of Vinegar Hill.
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Louis St. Laurent resigned as the prime minister of Canada.
Two newly discovered moons orbiting Pluto were named Nix and Hydra.
King Louis XVI, Marie Antoinette, and their immediate family fled their home at the beginning of the French Revolution.
Construction on the world's longest railway in Russia was completed.
Carl Nassib became the first openly-gay NFL player to play a regular-season game.
