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 at state dinners and other official functions, and leads the color guard at various parades and ceremonies. The following streamers are authorized, in order of precedence: Each unit in the Corps of battalion-size or larger also hold an organizational color (which makes up the unit's colors along with the national flag). It is usually identical to the Marine Corps battle color, though the scroll will have the unit's name instead of "United States Marine Corps". It will also bear the streamers authorized to the unit, or scarlet and gold tassels if none are authorized. Each Corps unit has a designated