|Battle at Mirror Earth|
|Part of Mirror War|
|Date:||17 October 2602|
|Result:||Second Terran Empire victory|
|Battle of Vulcan|
Starfleet learned that they could cross over to the mirror universe in unstable regions of space. They chose the Thorn, a very unstable region of space, to cross over. After a few days in which ships arrived, including the USS Majestic and the USS Unlimited, the fleet crossed over. The plan was to head towards the mirror Earth and take control of it.
When the ships arrived, surprisingly, the Second Terran Empire knew that they were coming. A huge battle ensued, in which most of Starfleet's ships were destroyed. During the battle, Sarah Perlark was almost fatally injured due to a torpedo exploding inside the Majestic. Because of her, the Majestic wasn't destroyed by the torpedo. Eventually, Starfleet retreated from the battle, and warped away towards the Thorn.
Sarah Perlark almost died due to the torpedo. She was rushed to Starfleet Medical on the Majestic, while James sat by her side the entire time.