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""
Culture of the United States Marine Corps and history is cited as a reason for its high "esprit de corps". Many traditions and customs of the Corps are officially recognized through orders, histories, and ceremonies; some are even embodied within the uniform itself. The Marine Corps Core Values of Honor, Courage, and Commitment have gained increased prominence in recent years. As an emphasis on performing morally on and off duty, the concept of core values has been infiltrated into many aspects of Marine life, beginning in recruit training and continuing into combat. This "warrior ethos" provides guidance to Marines in difficult ethical situations and acts as a