The deaths Saturday of 30 U.S. troops, including 22 Navy SEALs, in a helicopter crash in eastern Afghanistan make it the deadliest single-day incident for coalition service members in the Afghan war, according to a CNN count.
Since the war in Afghanistan began in October 2001, several other large-scale incidents have claimed the lives of 10 or more personnel.
April 6, 2005: Fifteen U.S. soldiers and three civilian contractors were killed when a coalition helicopter traveling in severe weather crashed near Ghazni.
June 27, 2005: Sixteen Americans - eight soldiers and eight sailors - were killed when their MH-47 helicopter was downed by a rocket-propelled grenade near Kunar province.
May 6, 2006: A U.S. helicopter crashed near Asadabad in Kunar province, killing all 10 U.S. soldiers aboard.
October 26, 2009: Three Drug Enforcement Administration special agents and seven U.S. troops were killed in western Afghanistan as they returned from a raid on a compound believed to be harboring insurgents tied to drug trafficking.
September 2, 2006: Fourteen British troops died when a NATO International Security Assistance Force plane crashed west of Kandahar. The crash is believed to be caused by a technical problem and was not the result of enemy action.
August 18, 2008: Ten French soldiers were killed and 21 injured when about 100 insurgents attacked a patrol in Kabul province.
August 16, 2005: Seventeen Spanish troops died in a helicopter crash. Spain's defense minister at the time said an accident was the most likely cause of the incident but investigators hadn't ruled out an attack.