 The United States Marine Corps School of Infantry East is the next destination for all Marines trained at Marine Corps Recruit Depot Parris Island.Here, Marines of an infantry Military Occupational Specialty are trained in their specific field during a 59-day course at the Infantry Training Battalion, while non-infantry Marines attend a 29-day course known as Marine Combat Training.The Staff Noncommissioned Officer Academy provides advanced leadership training for Marines at every SNCO rank, from Staff Sergeant and up.