What is infantry in the Marines?

The 03 Occupational Career Field in the U.S. Marine Corps are combat arms related in the Infantry. The USMC Infantry are ground forces that are trained to locate, close with and destroy the enemy by fire and maneuver, or repel the enemy's assault by fire and close combat. read more

Infantry. As an Infantry Marine you will be among the most highly trained and deadliest fighting force in the world. Infantry Marines fight and defeat the enemy using small unit tactics across the full range of military operations. read more

Get job descriptions and qualification factors for United States Marine Corps enlisted MOSs (jobs) such as, Field 03 Infantry. read more