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""
History of the United States Marine Corps Marine Corps Reserve in 1918 during World War I, officially becoming the first female Marine. From then until the end of World War I, 305 women enlisted in the Corps. The Marine Corps had entered the war with 511 officers and 13,214 enlisted personnel and, by 11 November 1918, had reached a strength of 2,400 officers and 70,000 enlisted. The war cost 2,461 dead and 9,520 wounded Marines, while eight would earn the Medal of Honor. Between the world wars, the Marine Corps was headed by Major General John A. Lejeune, another popular commandant. The Marine Corps was searching for