The 7th Marine Regiment is an infantry regiment of the United States Marine Corps based at Marine Corps Air Ground Combat Center Twentynine Palms, California. Nicknamed the "Magnificent Seventh", the regiment falls under the command of the 1st Marine Division and the I Marine Expeditionary Force. Mission Conduct mechanized, combined-arms operations and other expeditionary operations in order to support theater engagement plans and contingency operations. The regiment will be prepared to deploy within 48-hours of the receipt of an execute order as either the ground combat element for the 1st Marine Expeditionary Brigade (1st MEB) or as a major subordinate element of the 1st Marine Division. As directed, the regiment will prepare infantry battalions for deployment to the Pacific Command (PACOM AOR) in order to support III Marine Expeditionary Force (III MEF) operations and training Subordinate Units 1st Battalion, 7th Marines (1/7) 2nd Battalion, 7th Marines (2/7) 3rd Battalion, 7th Marines (3/7) 3rd Battalion, 4th Marines (3/4) – (assigned to the 7th Marine Regiment for the purpose of facilitating 4th Marines as a "host" regimental headquarters for battalions on unit deployment program assignments to 3rd Marine Division on Okinawa.) History Early years The 7th Marine Regiment was formed in Philadelphia, Pennsylvania on 14 August 1917. From August 1917 through August 1919, the 7th Marine Regiment served in Cuba. Returning to Philadelphia in August 1919 the regiment was decommissioned on 6 September 1919. The regiment was reactivated on 6 September 1933 at Marine Corps Base Quantico, Virginia with two battalions and was again alerted for service in Cuba but did not deploy. At the end of the crisis, 7th Marines' battalions were re-designated and the regiment was once again decommissioned on 17 January 1934. World War II On 1 January 1941, the 7th Marine Regiment was re-activated at Guantanamo Bay, Cuba. The regiment moved to what is today Marine Corps Base Camp Lejeune, North Carolina. In the spring of 1942 the 7th along with 1/11 were detached to form the 3rd Marine Brigade for duty in Samoa. On 18 September 1942 the regiment, now reassigned to the 1st Marine Division, landed in the Solomon Islands on Guadalcanal. For four long months the regiment relentlessly attacked the Japanese defenders and repulsed banzai charges and suicidal attacks. Colonel Amor L. Sims led the regiment during the whole Guadalcanal campaign and his men annihilated over 6,000 Japanese in 42 separate engagements. Arriving in Australia