The Basic School (TBS) is where all newly commissioned United States Marine Corps officers are sent to learn the art and science of being an Officer of Marines. TBS currently lasts 26 weeks. During those 26 weeks, the new officers are given extensive classroom, field, and practical application training on subjects ranging from weapons and tactics to leadership and protocol. Whether commissioned from the Naval Academy, NROTC or one of the other Officer Candidate School (OCS) routes, TBS is the first stop for new Marine officers. During TBS, the officers are selected for a Military Occupational Specialty (MOS) ranging from Infantry to Military Police to Naval Aviator. Following TBS, the Officer will attend one or more additional schools to be trained in that particular specialty prior to bei