The U.S. embassy in Beirut, Lebanon, is almost completely destroyed by a car-bomb explosion that kills 63 people, including the suicide bomber and 17 Americans. The terrorist attack was carried out in protest of the U.S. military presence in Lebanon.

In 1975, a bloody civil war erupted in Lebanon, with Palestinian and leftist Muslim guerrillas battling militias of the Christian Phalange Party, the Maronite Christian community, and other groups. During the next few years, Syrian, Israeli, and United Nations interventions failed to resolve the factional fighting, and on August 20, 1982, a multinational force featuring U.S. Marines landed in Beirut to oversee the Palestinian withdrawal from Lebanon.

The Marines left Lebanese territory on September 10 but returned on September 29, following the massacre of Palestinian refugees by a Christian militia. The next day, the first U.S. Marine to die during the mission was killed while defusing a bomb, and on April 18, 1983, the U.S. embassy in Beirut was bombed. On October 23, Lebanese terrorists evaded security measures and drove a truck packed with explosives into the U.S. Marine barracks in Beirut, killing 241 U.S. military personnel. Fifty-eight French soldiers were killed almost simultaneously in a separate suicide terrorist attack. On February 7, 1984, U.S. President Ronald Reagan announced the end of U.S. participation in the peacekeeping force, and on February 26 the last U.S. Marines left Beirut.