Despite the Imperial victory on Bastion and almost the entire Sith fleet was destroyed, it was more of a victory than a loss. While the entire Imperial military was at Korriban, the Sith took other important and lightly defended worlds. Now, the only thing that stood in their way from total conquest was the galactic rebellions that sprung up, and that the heads of the New Galactic Empire were still alive. Soon after the repelled invasion of Bastion, they returned and took it over. Ty and John got onboard a gunship and went up to the fleet.