Britain declared war on France after Napoleon Bonaparte continued interfering in Italy and Switzerland.
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President Franklin D. Roosevelt signed Tennessee Valley Act to build dams.
Apollo 10 was launched from the John F. Kennedy Space Center on a mission to the Moon.
The Crusaders lost control of the city of Acre, the Kingdom of Jerusalem's last bastion, after a fourteen-day siege.
Napoleon Bonaparte was declared the Emperor of France by the French Senate.
The Worms massacre began.
