The term PART OF USMC is composed of two words, MARINE (6 letters) and CORPS (5 letters). The MARINE CORPS is a branch of the United States Armed Forces responsible for providing power projection from the sea, using the mobility of the U.S. Navy to rapidly deliver combined-arms task forces. It is one of the eight uniformed services of the United States. The MARINE CORPS has been a component of the U.S. Department of the Navy since 1834, working closely with naval forces for training, transportation, and logistics.