Watchtower I

Watchtower I was the original headquarters of the original Justice League.

History
After the Imperium invasion, Batman had the idea to use the Watchtower after General Wells stated they have the means to detect advance warning of another alien invasion. Batman said it was a secret from Wayne's stockholders.

The Justice League made it their headquarters to keep an eye on Earth below.

The Watchtower was fully automated so it did not need a large crew to operate it beyond the seven League members. Entry was restricted to these seven, who also carried special transmitters to allow them entry.

During the Thanagarian invasion, it was sacrificed when Batman moved it out of orbit and piloted it down to Earth to destroy the Thanagarians' hyperspace bypass generator and the watchtower along with it..

The newly expanded League was headquartered in the larger Watchtower II.