522 BC: Darius I of Persia kills the Magian usurper Gaumâta, securing his position as king of the Persian Empire

480 BC: Battle of Salamis: The Greek fleet under Themistocles defeats the Persian fleet under Xerxes I

1567: War of Religion breaks out in France as Huguenots try to kidnap King Charles IX

1829: First units of the London Metropolitan Police appear on the streets of the British capital, the city’s first modern police force

2008: Dow Jones Industrial Average falls 777.68 points, its then-largest single-day point loss, following the bankruptcies of Lehman Brothers and Washington Mutual

Source: Onthisday.com