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""
Badges of the United States Marine Corps to describe "identification badges" and "marksmanship badges", and the term "insignia" shall be used for other worn accoutrements, according to the language in Marine Corps Uniform Regulations. The modern-day United States Marine Corps currently maintains the following breast insignia and identification badges: As per Marine Corps Assignment, Classification and Travel Systems Manual (ACTS MANUAL) MCO P1000.6, Marines wear the appropriate breast insignia for qualification or designation in aviation, parachutist, explosive ordnance disposal, and diving. Authorized breast insignia are worn on the left breast of all service and dress coats. They may optionally be worn on khaki shirts when the shirt