The Terran Empire, is the Human militaristic governmental authority that controlled Earth and surrounding space through the use of the powerful Imperial Starfleet in the dark mirror universe. They were one of the dominant powers in the Alpha Quadrant and Beta Quadrant in the 22nd, 23rd, 24th, 25th and 28th centuries. The Terrans were allies with the Bajorans and their Empire, the Bajoran Empire.