This earliest form of conscription involved selective drafts of militiamen for service in particular campaigns.

Colonial militia laws-and after independence those of the United States and the various states-required able-bodied males to enroll in the militia, to undergo a minimum of military training, and to serve for limited periods of time in war or emergency. In colonial times, the Thirteen Colonies used a militia system for defense. See also: Conscientious objection in the United States § History Colonial to 1862 United States federal law also continues to provide for the compulsory conscription of men between the ages of 17 and 45 and certain women for militia service pursuant to Article I, Section 8 of the United States Constitution and 10 U.S. citizens, regardless of where they live, and male immigrants, whether documented or undocumented, residing within the United States, who are 18 through 25 are required to register with the Selective Service System. However, conscription remains in place on a contingency basis and all male U.S. Active conscription came to an end in 1973 when the United States Armed Forces moved to an all-volunteer military. 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. It was the country's first peacetime draft. The fourth incarnation of the draft came into being in 1940 through the Selective Training and Service Act. 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.

Half life 2 conscripts