UNSC Marine Corps (Earth-5875)

The UNSC Marine Corps is one of the two branches of the UNSC Armed Forces, conducting expeditionary combat operations and military operations supplied by the UNSC Navy, which they also defend from hostile forces. They serve under the UNSC High Command

History
The United States Marine Corps, founded in 1775, was the precursor to the UNSC Marine Corps. With the start of the Interplanetary War in the 2160, majority of the national governments of Earth and the rest of the Sol system joined together in order to combat the threat of the SDF movement, although initially it proved to be a confusion and disorder duo to the vastly different organizations of each military force, which led the United Nations to brand it the United Nations Space Command in 2163; with the UNSC Marine Corps being formed from Marine and UNSC Navy assets. After the Rainforest Wars, which was caused by numerous Koslovics attacks at the Argyre Planitia on Mars, the United Nations initiated the Mars Campaign in 2163, which saw the first use of the UNSC Marine Corps with a series of strikes against Koslovics.