The United States Marine Corps is a rapid reaction force, and it is the only force that the President of the United States can mobilize without the approval of Congress. Under normal circumstances, MEU is paired with amphibious assault formations, and the US Marine Corps has strong firepower and maneuverability. Usually, when there is a regional conflict, the US Marine Corps is often the first US military to arrive in the conflict area. In the Iraq war, the Marine Corps often undertakes the task of tackling key problems, so the US Marine Corps is well-trained and has strong combat effectiveness. In the war that the United States participated in, the first thing that the US military executives thought of was to let the Marine Corps go.