Executor-class Star Dreadnought

"I look at the state of the Empire and think, 'How many Super Star Destroyers could we have made with the resources we threw into Tarkin's folly?'"

- Grand General Cassio Tagge, referring to the Death Star

Executor-class Star Dreadnoughts, also known as Super-class Star Destroyers, were some of the largest and most powerful Imperial starships ever created. Along with other classes of massive Imperial capital ships, they were also referred to as Super Star Destroyers, although they were technically classified as Star Dreadnoughts. The most distinguished Super Star Destroyer was the Executor, flagship of the Dark Lord of the Sith, Darth Vader.

History
According to the Rebel Alliance's intelligence agency, more than a dozen Super Star Destroyers were made, including the Executor itself, the Annihilator, the Arbitrator, the Eclipse, and the Ravager. However, the true number remained a subject of debate, as Alliance analysts endeavored to make sense of Imperial propaganda and see through the black budgets designed to hide the scope of the Emperor Palpatine's secret weapons programs. Darth Vader's flagship saw action at the Battle of Hoth and the Escape from Cloud City before being destroyed at the Battle of Endor in 4 ABY.

In the months after the events of Endor, the New Republic, the successor government to the Alliance, destroyed five Super Star Destroyers and captured three of the ships. The only known Super Star Destroyer, and so the only known Executor-class, to remain in Imperial hands was Grand Admiral Rae Sloane's flagship Ravager, which also served as the base for Fleet Admiral Gallius Rax. In 5 ABY, Sloane discovered evidence that the Emperor's command ship, the Super Star Destroyer Eclipse, had not been destroyed but had vanished from the official records.

Following Sloane's disappearance during the attack on Chandrila, Fleet Admiral Rax formally took command of the Ravager as Counselor to the Empire. The Ravager then rendezvoused with a large Imperial armada on the barren planet of Jakku for a showdown with the New Republic. The Ravager was shot down during the battle and crash-landed on the desert planet.

Non-canon appearances

 * LEGO Star Wars: The Force Awakens
 * LEGO Star Wars: The Force Awakens