

Human-Covenant war Main article: Human-Covenant warĭuring the course of the Human-Covenant war, the Marines played a central role in maintaining a defensive stand as well as assaulting several Covenant base of operations. Marines were highly utilised during Operation: TREBUCHET. Later, the UNSC Marine Corps would be responsible for dealing with Insurrectionist uprisings among UNSC colonies star systems. It only gained prominence out in other systems after the CMA's fall from grace. When the UNSC began expanding in the 24th century, the Marine Corps was retained within the Sol system. After the United Nations claimed victory in 2164, it reorganized into the UNSC, thereby changing the UN Marine Corps to the UNSC Marine Corps. The UN Marine Corps (predecessor of the UNSC Marine Corps) was one of the primary combat groups fielded by the UN in the Interplanetary War, and were the first military organization deployed offworld in 2163.
