A renowned Mon Calamari admiral, Gial Ackbar was a former Imperial slave who joined the Rebel Alliance. He was involved in the preparations for the Battle of Endor aboard his flagship, the Home One, and led the Alliance Fleet in the battle over Endor's forest moon. However, he soon discovered that the battle was a trap by the Empire, as the Death Star's weapon systems were already in operation, even though the Rebels had believed the opposite. The Alliance took heavy casualties, and the battle became a fight for the Rebels' lives as Ackbar's cruiser came under attack. However, Ackbar ordered the fleet to fire on the Executor to buy Calrissian and Antilles enough time to destroy the Death Star's core, and the tide of the battle turned in favor of the Alliance. Soon after, Lando Calrissian and Wedge Antilles were able to destroy the Death Star from the inside, leading the Alliance to a nearly impossible victory. Being hailed as one of the battle's many heroes, Ackbar would go on to serve the New republic for over two decades. [Star Wars Wikia]