The Terran Empire was the repressive interstellar government dominated by the Terran's from Nuyi'zu Earth in the Nuyi'zu universe. The Empire ruled by terror, with its Imperial Starfleet acting as its iron fist. In Starfleet, officers promoted themselves by killing superiors that did not follow the rules of the Empire. Torture was a common form of interrogation. The Empire was the counterpart of the prime universe United Earth and the United Federation of Planets governments. They joined the Axis of Empires to battle their enemy, the UFP which joined the Alliance of Nations and later joined the Imperialist Alliance.