Pellaeon took command of the fleet after the Executor was destroyed and his own ship's captain was killed. They ordered a retreat after Palpatine died, (battle meditation or something) and fled to a friendly system. For the next 2 decades or so, the Empire would degrade into Warlordism until Thrawn, Daala, and then Pellaeon take control of the Remnant and sign a peace treaty with the Republic.
__________________ Recently Produced and Distributed Young but High-Ranking Political Figure of Royal Ancestry within the Modern American Town Affectionately Referred To as Bel-Air.