The U.S. Marine Corps is an amphibious assault force among the five independent U.S. services. Its main responsibility is to use all fleet ships under the U.S. Navy to reach every crisis location around the world as quickly as possible to perform various combat missions. , A service that can independently conduct various training and combat missions, its standard equipment is F-35B stealth fighter and MV-22 helicopter. Known as "The Third Air Force" (The Third Air Force)