Between 3 ABY and 4 ABY, a conflict erupted concerning the Executor. This flagship of Sith Lord Darth Vader became the target of droids, which had been corrupted by the [Scourge]. The Scourge's goal was to strike at Vader himself, following his triumph over their prior assault. These droids, many recently part of the droid uprising but now serving Vader, seized control of the ship, thus endangering it. This led Emperor Sheev Palpatine, through Grand Vizier Mas Amedda, to command Vader to reclaim it. Throughout this battle, the Sith Lord was compelled to combat the Scourge-infected droids. Concurrently, five hostile Star Destroyers encircled the Executor in a battle formation. Amedda, considering the Executor irredeemable, commanded its destruction to halt the Scourge's spread. Nevertheless, Admiral Corleque stalled the order, allowing Vader's droids enough time to disable the Executor's systems. However, the Scourge infiltrated Corleque's flagship, the Unbreakable, which Admiral Firmus Piett eliminated after granting his comrade only four seconds to quarantine the contagion.