On October 23, 1983 a Palestinian suicide attack on a U.S. Marine barracks in Beirut killed 241 Marines and sailors. They had been sent as part of a peace-keeping force.
On October 7, 1985, four Palestinian terrorists hijackers seized the Italian cruise ship Achille Lauro in the Mediterranean for two days. One American, Leon Klinghoffer, was killed. He was in a wheelchair when he was pushed overboard.
On October 12, 2000, seventeen U.S. sailors were killed in a terrorist bombing of the USS Cole which was refueling in Aden, Yemen.
On October 7, 2001, the U.S. and Britain launched a sustained air-strike campaign against Afghan-based terrorists, member of al Qaeda, and the ruling Taliban militia.
Source: The World Almanac and Book of Facts 2007