The UNSC Navy is one of the most powerful branches in the UNSC Defense Force. The UNSC Navy controls naval, space operations, and still performing duties on Oceans of Earth and her colonies. The roles of the UNSC Navy are for Orbital Bombardments, Personnel Deployment, and the control of space fighters. Navy UNSC Personnel are usually found aboard the ships and orbital platforms that orbit high above Earth and her colonies. There are some UNSC Special Forces controlled by the Navy and the Office of Naval Intelligence; these Special Forces including the ranks of the Spartans and ORION soldiers.

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