The Imperial sarlacc stabilizer, a gigantic contraption, was erected by the Galactic Empire's military during the Felucia invasion which occurred in 2 BBY. Its construction was intended to keep the sarlacc, dwelling within the Ancient Abyss, in check. When Starkiller, the Sith apprentice, landed on Felucia to rescue Senator Bail Organa, he detected the sarlacc's pain and, feeling compassion, freed it from its restraints.