entitled Men Against Fire, which claimed that only 25% of Soldiers had fired their weapons in WWII due to strong social norms against killing. Although his findings were controversial, the Army adapted basic training to include attack exercises. Dedicated Drill Sergeants were added to basic training in 1964. In 1973, Basic Training came under control of the newly created United States Army Training and Doctrine Command. Locations The recruit's entry location in the United States determines where the recruit will attend Basic Combat Training "if the recruit chose a non-combat support MOS". A recruit that has chosen a particular combat MOS (Infantry, Military Police, Combat Engineer) will require specific OSUT. Advanced Individual Training depends on the Soldier's determined Military Occupational Specialty, or MOS, which is selected upon enlistment into the Army. For a non-combat support MOS, AIT will commence following successful completion of Basic Training. Soldiers requiring air transportation to their training locations are flown via commercial flight at the Army's expense. One Station Unit Training With some MOSs, both the BCT and AIT phases of training are accomplished back-to-back at the same location, with the same instructors, as well as with the same fellow recruits. This is called One Station Unit Training, or OSUT. For example, the Infantry MOS consists of BCT followed by 12 weeks of Infantry training, all within the same location. A similar program is followed for Combat Engineers and Bridge Crewmen, who train for 14 consecutive weeks, as well as Cavalry Scouts, Tank Crewmen, and Military Police. Basic Combat Training sites The U.S. Army has four sites for BCT: Fort Benning near Columbus, Georgia; also provides Infantry and Armor OSUT Fort Jackson near Columbia, South Carolina; non-combat MOS Fort Leonard Wood near St. Robert, Missouri; also provides Corps of Engineers OSUT and AIT, Chemical Corps AIT, and Military Police OSUT Fort Sill near Lawton, Oklahoma; also provides Artillery AIT Advanced Individual Training AIT is conducted at the corresponding school for the recruit's MOS (see Advanced Individual Training). Reception Battalion Reception Battalion (RECBN) is the period that begins when the recruit arrives at the Army post where he or she is to undergo Basic Training. It typically lasts 4 to 10 days and is where initial preparations for training are performed, including: Haircut (buzz cut for men; women must either cut hair short or wear pinned up) Physical examination (including blood and urine tests) Inoculations Distribution