The USS Unlimited was the flagship of the First Fleet, under the command of Admiral Frank Riker and Admiral William Deker. (Star Trek: Mirror Wars)


On October 15, 2602, right after a battle with the mirror universe, the Unlimited pursued the USS Majestic when it was taken over by a spy. It finally caught up with the ship after chasing it for one hour, and used a tractor beam to take the ship to the Thorn, where Starfleet planned to enter the mirror universe to attack mirror Earth.