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""
Commandant of the Marine Corps CMC designates Marine personnel and resources to the commanders of Unified Combatant Commands. The Commandant performs all other functions prescribed in Section 5043 in Title 10 of the United States Code or delegates those duties and responsibilities to other officers in his administration in his name. As with the other joint chiefs, the Commandant is an administrative position and has no operational command authority over United States Marine Corps forces. The Commandant is nominated by the President for a four-year term of office and must be confirmed by the Senate. By statute, the Commandant is appointed as a four-star general