With chaos ensuing throughout the Empire with the destuction of the Death Star, a man calling himself Palpatine rose to power and drew a large amount of support to his banner. War was declared upon Bacharan Valak, and Mon Calamari was the first target of Palpatine and his growing military. The planet was quick to fall, its defenses light and its garrison confused by what was happening. The Imperial Civil War had begun. From SW1ki, a Wikia wiki.