With its first major use in battle during the Vietnam War, the helicopter ushered in a radically different way of fighting, despite its proven vulnerability to ground fire. Either delivering troops into hostile territory and removing them after the fighting ended, or armed with guns, grenade launchers, and rockets to provide rapid and wide-ranging air to ground support fire, the helicopter - available for the first time in sufficient numbers and capable of a wide range of missions - played a central role in the war. Presenting a concise history of the first ever major use of helicopters in battle, Gordon L. Rottman, a former Green Beret in Vietnam, describes in detail the development of the critical airmobile tactics that ultimately changed the way America fights its battles.