The Executor-class Super-class Star Destroyers, also referred to as the Executor-class Star Dreadnoughts due to their immense size, are assigned only to the most important missions. These ships are fully equipped and, essentially, serve as mobile fortress-cities. The Executor-class can terrorize worlds beyond the capability for resistance, able to conquer enemies without firing a shot as they see the folly of trying to battle against such a monster. They are one of the largest classes of ship ever built.