Every Marine is, first and foremost, a Rifleman ~ General Al Gray, 29th CMC
The School of Infantry (SOI) is the second stage of initial military training for enlisted Marines after boot camp. Since the initial training pipeline is divided between coasts, Marines from areas east of the Mississippi River usually graduate from Parris Island and move on to SOI East located at Camp Geiger. Those from the western half of the nation attend MCRD San Diego and move on to SOI West at Camp Pendleton. Female Marines are an exception; all go through Parris Island and SOI East.
SOI‚??s training mission ensures Every Marine is, first and foremost, a Rifleman. At SOI, Marines with the 0300 Infantry MOS are trained at the Infantry Training Battalion (ITB) while non-infantry Marines are trained in basic infantry/combat skills at the Marine Combat Training Battalion (MCT Bn).¬†