Army Reserve Officers' Training Corps

The Army Reserve Officer Training Corps (AROTC) is the United States Army component of the Reserve Officers' Training Corps. It is the largest Reserve Officer Training Corps (ROTC) program which is a group of college and university-based officer training programs for training commissioned officers for the United States Army and its reserves components: the Army Reserves and the Army National Guard.

Source: Wikipedia — Army Reserve Officers' Training Corps (CC BY-SA 4.0)