Cpl. Christian D. Martinez is a rifleman with 7th Marine Regiment. His former battalion was, the now deactivated, 3rd Battalion, 4th Marines, 7th Marine Regiment, where he deployed twice with the unit's sniper platoon. - Cpl. Christian D. Martinez is a rifleman with 7th Marine Regiment. His former battalion was, the now deactivated, 3rd Battalion, 4th Marines, 7th Marine Regiment, where he deployed twice with the unit's sniper platoon.