Themistocles and his Greek fleet win one of history's first decisive naval victories over Xerxes' Persian force off Salamis.
The election of Robert of Geneva as anti-pope by discontented cardinals creates a great schism in the Catholic church.
Queen Elizabeth of England signs a treaty at Hampton Court with French Huguenot leader Louis de Bourbon, the Prince of Conde. The English will occupy Le Havre in return for aiding Bourbon against the Catholics of France.
Explorers Meriwether Lewis and William Clark pass the French village of La Charette, the first white settlement they have seen in more than two years.
The National Negro Convention convenes in Philadelphia with the purpose of abolishing slavery.
The slave trade is abolished in the District of Columbia.
The Allies defeat the Russians at the Battle of Alma on the Crimean Peninsula.
Hurricane Irene becomes the first hurricane known to cross from the Atlantic to Pacific, where it is renamed Hurricane Olivia.
In a pro tennis bout dubbed "The Battle of the Sexes," Billie Jean King beats Bobby Riggs at the Houston Astrodome in Texas.
British MI6 Secret intelligence Service building in London attacked by unidentified group using RPG-22 anti-tank missile.
A truck loaded with explosives detonates by Marriott hotel in Islamabad, Pakistan, killing 45 and injuring 226.