In a ceremony at the White House, President Sadat of Egypt and Prime Minister Begin of Israel signed a peace treaty ending 30 years of war between the two countries.
The Biological Weapons Convention comes into effect. The treaty bans the development, production and stockpiling of biological and toxin weapons. It has now been ratified by most countries worldwide.
In support of Mohammed Ali Shah's coup d'etat against the constitutional government in Persia, a Russian military force invades northern Persia to relieve the siege of Tabriz.