or Split-Op) is an enlistment option available for Army National Guard and United States Army Reserve recruits. This program allows individuals to attend Basic Training during one summer, drill with their respective units once a month on weekends while attending school, and then within one year of completion of BCT, the Soldiers are ordered to AIT, Phase II of IET, and complete their required MOS training after graduation. This enlistment option is usually popular among high school students who wish to enlist as early as possible, while still attending school. The split option program is also available to seasonal workers, and college students. History During the American Revolutionary War, the Continental Army trained while encamped. In 1778, Friedrich Wilhelm von Steuben initiated the first formalized training program. Following the war, the Army was largely disbanded in favor of militias. Following disastrous losses to Native Americans, however, the United States authorized the Legion of the United States. Led by Major General Anthony Wayne, the Legion constructed a training camp called Legionville near Pittsburgh. This is considered the Army's first basic training camp. During the American Civil War, both the Union and Confederate armies relied on volunteer state units to quickly grow their armies. In contrast to the Regular federal units, state units fought in battles with little formal training. The United States Army began a systematic, 16-week program to train individual Soldiers when it entered World War I in 1917. The Army established more than 30 training camps to prepare state troops and new recruits. Due to the urgent need to aid France, training was more focused on mobilization than combat training. Soldiers arrived quickly in France, but required additional training once they arrived, in order to make them combat ready. This highlighted the need for a standardized training regimen that would provide new Soldiers with rudimentary combat training. The Army was greatly reduced after the Armistice of 11 November 1918, but World War II again created the need to train a large number of new Soldiers. Recruits and draftees first reported to Induction Centers, where they were administratively and medically processed into the Army. Following induction, new Soldiers were sent to specialized training which, for combat arms, meant basic training. Following WWII, the Army retained an 8-week standardized basic training course, but advanced training was left to the responsibility of unit commanders. Colonel S.L.A. Marshall published a book in 1947