MILITARY BRANCH INSIGNIAInsignia galleryNorth AmericaUnited States of America (1866 since)MILITARY BRANCH INSIGNIAUnited States Air Force - USAF [flag officers]United States Army - USA [enlisted branch of service insignia]United States Army - USA [flag officers]United States Army officers branch of service insigniaUnited States Coast Guard - USCG [flag officers]United States Marine Corps - USMC [flags officers]United States Navy - USN [flag officers]United States Navy - USN officers line and staff corps devices branch insignia