1971 in the Vietnam War

U.S. military personnel in South Vietnam totaled 334,600 on 31 December 1970. 1 January - May 1971 Project Copper was an unsuccessful operation to use three Central Intelligence Agency (CIA)-trained Cambodian irregular force battalions to interdict the Sihanouk Trail. One battalion deserted, one mutinied during training and the third suffered extensive casualties and had to be withdrawn to assist in the defense of Phnom Penh. 5 January 5 January - 11 February 5 January - 30 May 6 January 7 January 11 January - 29 March 17 January 13 to 25 January 21-2 January 24 January

1971 in the Vietnam War

U.S. military personnel in South Vietnam totaled 334,600 on 31 December 1970. 1 January - May 1971 Project Copper was an unsuccessful operation to use three Central Intelligence Agency (CIA)-trained Cambodian irregular force battalions to interdict the Sihanouk Trail. One battalion deserted, one mutinied during training and the third suffered extensive casualties and had to be withdrawn to assist in the defense of Phnom Penh. 5 January 5 January - 11 February 5 January - 30 May 6 January 7 January 11 January - 29 March 17 January 13 to 25 January 21-2 January 24 January