Ozzel was an Imperial Officer who basically failed upwards. He had an efficient team of brown-nosers by the time he reached commander of The Executor, Darth Vader's personal flagship. When coming out of Hyperspace too close to the planet Hoth, the Rebels were alerted to the Imperial Fleet's arrival. With their shield up, a surface attack was now the only way. Despite his reasoning, Ozzel was assured that he was incorrect by Lord Vader and slowly taken out of the picture. Admiral Piett was his replacement.