The Basic School (TBS) is where all newly commissioned and appointed (for warrant officers) United States Marine Corps officers are taught the basics of being an "Officer of Marines". The Basic School is located at Camp Barrett, Quantico, Virginia, in the south-west of the Marine Corps Base Quantico complex. Each year over 1,700 new officers are trained, representing such commissioning sources as the U.S. Naval Academy, Navy ROTC (Marine Option), Officer Candidates School, and Marine Corps Limited Duty Officer (LDO) and Warrant Officer accession programs.