Conscription in the United States, commonly known as the draft, has been employed by the federal government of the United States in six conflicts: the American Revolutionary War, the American Civil War, World War I, World War II, the Korean War, and the Vietnam War. The fourth incarnation of the draft came into being in 1940 through the Selective Training and Service Act. It was the country's first peacetime draft. From 1940 until 1973, during both peacetime and periods of conflict, men were drafted to fill vacancies in the United States Armed Forces that could not be filled through voluntary means. Active conscription came to an end in 1973 when the United States Armed Forces moved to an all-volunteer military. However, conscription remains in place on a contingency basis and all male U.S