United States Marine Corps served as a convenient resource for interventions and landings to protect American interests overseas. The Corps was involved in over 28 separate interventions in the 30 years from the end of the American Civil War to the end of 19th century. They would be called upon to stem political and labor unrest within the United States. Under Commandant Jacob Zeilin's tenure, Marine customs and traditions took shape: the Corps adopted the Marine Corps emblem on 19 November 1868. It was during this time that "The Marines' Hymn" was first heard. Around 1883, the Marines adopted their current motto ""Semper Fidelis""
Flag of the United States Marine Corps and 21st centuries. The official battle color of the Corps is maintained by Marine Barracks, Washington, D.C. ("8th and I"), and carried by the Color Sergeant of the Marine Corps. The position of the Color Sergeant was first officially designated in 1965 and was first held by Gunnery Sgt. Shelton L. Eakin. The billet is a two-year tour open to all Sergeants; the only caveat being that the applicant must be at least tall and pass a rigorous White House security check. The Color Sergeant of the Marine Corps traditionally carries the Flag of the President of the United States