Army ROTC has traditionally been a four-year program. Individuals with prior military service, members of Reserve or National Guard units and summer ROTC leadership training course attendees may obtain advanced placement credit and enter and complete the program in two years. Normally all students enroll in one military science and leadership course and leadership laboratory per semester. Physical fitness of all enrolled students is stressed and closely monitored. The Army ROTC program consists of two phases, basic and advanced military science and leadership.