A Marine with 3rd Battalion, 12th Marine Regiment, patrols Camp Schwab looking for mock aggressors during a pre-deployment training exercise run by 4th Marine Regiment's Regimental Schools Feb. 8. - A Marine with 3rd Battalion, 12th Marine Regiment, patrols Camp Schwab looking for mock aggressors during a pre-deployment training exercise run by 4th Marine Regiment's Regimental Schools Feb. 8.