The branches of the United States military are the Army, Marine Corps, Navy, Air Force, Space Force, and Coast Guard. Each branch has its own unique mission within the overall mission of U.S. security and peace. The Army provides the ground forces that protect the United States, while the Marine Corps maintains amphibious and ground units for contingency and combat operations. The Navy is America’s forward-deployed force and is a major deterrent to aggression around the world. The Air Force provides a rapid, flexible, and lethal air and space capability that can deliver forces anywhere in the world within hours. The Space Force organizes, trains, and equips space forces in order to protect U.S. and allied interests in space and to provide space capabilities to the joint force. The Coast Guard provides law and maritime safety enforcement, marine and environmental protection, and military naval support. The Army National Guard and the Air National Guard are reserve components of their services and operate in part under state authority. The National Guard is a versatile force, supporting combat missions, domestic emergencies, humanitarian efforts, homeland security operations, and more.