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 designated gold and scarlet as the official colors of the U.S. Marine Corps. These colors, however, were not reflected in the official Marine Corps standard until 18 January 1939, when a new design incorporating the new colors was approved. The design was essentially that of today's Marine Corps standard. For a brief time following World War I, the inscribing of battle honors directly on the colors of a unit was in practice, but realization that a multiplicity of honors and the limited space on the colors made the system impractical, and the procedure was discontinued. On 29 July 1936, a