A conflict occurred in 3 ABY on the planetoid Polis Massa at the Polis Massa Base, involving the Galactic Empire and the Amidalans. The Dark Lord of the Sith Darth Vader, accompanied by his droid ZED-6-7 and his personal guard of three death troopers, journeyed to the planetoid with the purpose of discovering the circumstances surrounding the death of his previous wife, Padmé Amidala.