Sparta and The Athenian League form a peace pact.
E-mail invented by Ray Tomlinson.
The Eastern Chou Dynasty in China begins.
German mathematician-philosopher Gottfried Wilhelm von Leibniz, recognised as one of the founding fathers of calculus, designs a calculating machine called the Step Reckoner.
Stock ticker invented by Thomas Alva Edison.
The Gospel Luke portion of the bible is written.
Syria is conquered by Saladin.
Saladin is defeated by Baldwin IV at Montgisard.
President Nixon (U.S.) is forced to resign after Watergate scandal.
Shah of Iran leaves and exiled religious leader Ayatollah Khomeini returns.