The 1st Marine Division was activated aboard the battleship USS Texas on 1 February 1941. It is the oldest, largest, and most decorated division in the United States Marine Corps, with nine Presidential Unit Citations (PUCs). The 1st Marine Division comprises a Headquarters Battalion, the 1st, 5th, 7th, and 11th Marine Regiments, 1st Reconnaissance Battalion, 1st Combat Engineer Battalion, 1st and 3d Light Armored Reconnaissance Battalions, 1st Tank Battalion, and 3d Assault Amphibian Battalion. These units represent a combat-ready force of more than 22,000 Marines and Sailors.