[𝐔𝐒𝐌𝐂] UNITED STATES MARINE CORPS [𝐔𝐒𝐌𝐂] MARINE CORPS OFFICER CANDIDATE SCHOOL [𝐀𝐁𝐎𝐔𝐓 𝐔𝐒] The Officer Candidate School is an external branch within the USMC. The Officer Candidacy will prepare you for your future career as an Officer in a branch of your choosing. This is a long and intense process that will guarantee your success as a future Officer. Officer Candidate School is designed to give you a framework for your role as a commander of a unit, division, or even a command.