Klingon Alliance Base

In the mirror universe, Klingon Alliance Base was a Terran Empire space station, a Fleet Starbase in Imperial Starfleet service in the early 25th century. 

History
From 2410 onwards, Klingon Alliance Base was one of the Terran starbases transported to the Badlands of the primary universe to build a staging point. The attacks were led by Admiral $𝜇$ from the. The Alpha Quadrant Alliance succeeded in pushing the Terrans back into their own realm.