UNSC Marine: The United Nations Marine Corp combat group was the first military organization deployed off-world by the UN during the Interplanetary War. After claiming victory the UN reorganized and became the UNSC, renaming the combat group to UNSC Marine Corps.
UNSC Sergeant: The United Nations Space Command Marine Sergeant is a dedicated and fearless leader, ready to fight anywhere, anytime in the defense of humanity. Covenant beware!