Marine Corps Officer Candidate School (OCS) is a training program designed to evaluate and prepare individuals for leadership roles in the United States Marine Corps. It is typically attended by college students or graduates who aspire to become Marine Corps officers. The program lasts approximately 10 weeks and takes place at Quantico, Virginia. Candidates undergo rigorous physical training, leadership exercises, and academic instruction to develop the skills necessary for military service. Successful completion of OCS leads to a commission as a second lieutenant in the Marine Corps.