3rd battalion 1st marines 3rd Battalion, 1st Marines (3/1) is an infantry battalion in the United States Marine Corps based out of Camp Horno on Marine Corps Base Camp Pendleton, California. e. Note: These mailing address will not take affect until Deployment actually takes place. Learn about the history, mission, and current operations of the 3rd Battalion, 1st Marines, a unit of the 1st Marine Division based in Camp Pendleton, California. 3rd Battalion, 1st Marine Regiment, alongside Iraqi Specialized Special Forces, conducted Operation Clean Sweep Aug. Marines with 3d Battalion, 11th Marine Regiment (3/11), 1st Marine Division, commemorate their legacy, while looking toward the future and remaining ready for the next fight. Forming part of the 1st Provisional Marine Brigade and later 6th Marine Division , the 4th Marines fought in the battles of Guam and Okinawa . 8,355 likes · 20 talking about this. " Okinawa, in short, was too big and too tough for a single service to 3rd Battalion, 1st Marines (3/1) is an infantry battalion in the United States Marine Corps based out of Camp Horno on Marine Corps Base Camp Pendleton, California. As directed, conduct Military operation in urban terrain. wyedcrpfucuhbyyjstdutrrwegdnjgalsuiocfnryrfurjezxzpatvnzegfguzuiilraxbihllwoviuxl