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""
Military Secretary to the Commandant of the Marine Corps of the Commandant, and performs other duties as the Commandant may direct. In order to perform the multi-faceted duties of the Military Secretary, the Marine must be well versed in all aspects of the United States Marine Corps, the United States Department of Defense, and the United States Government. Comparable positions in other branches of the military are: The Military Secretary serves as a direct advisor to the Commandant of the Marine Corps. The Military Secretary is primarily responsible for filtering and directing the flow of information to the Commandant, keeping the Commandant abreast of situations impacting the Marine Corps,