"During the Vietnam War, the United States relied on the helicopter as never before. The helicopter's role in combat expanded enormously in this conflict as thousands of "choppers" rapidly transported personnel throughout the war zone. Heavily armed helicopters offered a fearsome component to ground operations as close air support. Mobility and firepower would be the keys for American operations in Vietnam, and the helicopter provided an abundance of both. But the role of the helicopter in support activities in the Vietnam War must not be overlooked, as thousands of missions were flown to resupply and reinforce troops on the ground, to evacuate American and South Vietnamese wounded, and to offer countless other services in pursuance of the war effort. The UH-1 "Huey" is the ubiquitous symbol of the American war in Vietnam. Indeed, the Vietnam War was the Helicopter War." Source: http://www.vietnam.ttu.edu/exhibits/helicopter/