On March 2, 1965, following an attack on a U.S. Marine barracks at Pleiku, Operation Flaming Dart and Operation Rolling Thunder commenced. The bombing campaign, which ultimately lasted three years, was intended to force North Vietnam to cease its support for the NLF by threatening to destroy North Vietnam's air defenses and industrial infrastructure. As well, it was aimed at bolstering the morale of the South Vietnamese. Between March 1965 and November 1968, "Rolling Thunder" deluged the north with a million tons of missiles, rockets and bombs. Bombing was not restricted to North Vietnam. Other aerial campaigns, such as Operation Commando Hunt, targeted different parts of the NLF and PAVN infrastructure. These included the Ho Chi Minh Trail, which ran through Laos and Cambodia. The objecti