New Hampshire became the 9th state to join the United States of America.
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King Louis XVI, Marie Antoinette, and their immediate family fled their home at the beginning of the French Revolution.
Carl Nassib became the first openly-gay NFL player to play a regular-season game.
Two newly discovered moons orbiting Pluto were named Nix and Hydra.
A Dutch pensions advisor, Johan de Witt, was severely wounded in a knife attack.
The British Army defeated Irish rebels at the Battle of Vinegar Hill.
