The United Nations Space Command (UNSC) is a fictional military organization in the video game series Halo. It serves as the primary human military and exploratory force in the game's universe, tasked with protecting humanity from various threats, including alien species. The UNSC is known for its advanced technology, including starships and weapons, and operates under the authority of the United Nations. It plays a crucial role in the ongoing conflict against the Covenant, a coalition of alien races, and is central to the storyline of the Halo franchise.