The British Army defeated Irish rebels at the Battle of Vinegar Hill.
Source
Carl Nassib became the first openly-gay NFL player to play a regular-season game.
Louis St. Laurent resigned as the prime minister of Canada.
J.K. Rowling published the 5th Harry Potter book 'The Order of the Phoenix.'
Cyrus McCormick patented the reaping machine.
King Louis XVI, Marie Antoinette, and their immediate family fled their home at the beginning of the French Revolution.