The title of this article is conjectural.

Although this article is based on official information from the Star Wars Legends continuity, the actual name of this subject is pure conjecture.

"I happen to know that a very important prisoner is being kept here before his transfer to Coruscant. We must free Luke Skywalker."
Brenn Tantor[src]

Sometime between 0 and 3 ABY, the Galactic Empire constructed a prison on the edge of a canyon on Kalaan. This prison was used in 3 ABY to hold Luke Skywalker while he was awaiting transport to Coruscant. At the same time, his captor, General Brenn Tantor, was imprisoned there for having refused an order to massacre a refugee camp shortly after Skywalker's capture on Abridon.

Brenn guarded

Brenn Tantor in his outdoor cell.

Tantor, however, was rescued by his own men, who helped him defect to the Rebel Alliance. To gain favor with the Rebels, Tantor and his stormtroopers stormed the prison and freed Skywalker. Also taking the Tracked Mobile Base, which had been parked at the prison, Tantor, Skywalker, and the stormtroopers reached Tyr Taskeen's base, where they were evacuated to a waiting fleet.