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 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 diverse commissioning sources as the U.S. Naval Academy, Naval ROTC, the Platoon Leaders Class program (PLC-Air, PLC-Ground, PLC-Law) for non-NROTC college and university students, Officer Candidates School, and Marine Corps Limited Duty Officer (LDO) and Warrant Officer accession programs.
The School's "Five Horizontal Themes" define the expectations of every student officer at TBS.
They are: