When activated at Marine Corps Base San Diego in Feb 1941 to succeed its forebear, the 2nd Marine Brigade (est. 1936), our 2nd Marine Division, "The Silent Second," consisted of the 2nd, 6th, and 8th Marine infantry regiments; 10th Marines, an artillery regiment; engineer, medical, service, and tank battalions; and transport, signal, chemical, and antiaircraft machine gun companies. The Journey Through the History of the 2nd Marine Division During WWII, the 2nd Marine Division (HQ) participated in the Pacific Theater of Operations, including combat and other action at Guadalcanal, Solomon Islands, Tarawa, Gilbert Islands, Saipan, Peleliu, Tinian, Cape Gloucester, Okinawa and Nagasaki (less than a month after the atomic weapon detonation there). Also, in WWII, two Seabee battalions were posted to the 2nd MARDIV; the 18th Naval Construction Battalion (NCB) was assigned to the 18th Marines as the third Battalion of the regiment. The Division did not take part in a major action...
