The Supremacy, disparagingly nicknamed «Snoke’s Boudoir,» was a Mega-class Star Dreadnought that served as the flagship of Supreme Leader Snoke and the mobile headquarters of the First Order. It was split in two by the Resistance flagship Raddus while attempting to destroy the remnants of the Resistance fleet near the planetCrait.

The Supremacy was the sole Mega-class Star Dreadnought in the First Order‘s service with a colossal wingspan of 60 kilometers and a length of 13 kilometers. These proportions made the Supremacy the largest capital ship in galactic history. Its construction was undertaken on an unprecedented scale. As the First Order’s headquarters, the starship acted both as a command center and a battleship. Its size was gargantuan, easily outclassing all known ship sizes in galactic history, including the Star Dreadnoughts of the Galactic Empire, the trophy battlecruisers used by wealthy citizens of the waning days of the Old Republic, and even the various reconstructed versions of the flagship used by Xim the Despot.

The ship was built by the First Order at staggering cost within the galaxy‘s Unknown Regions to act as the official capital of the First Order on the orders of Supreme Leader Snoke. Although various officers and allies of the First Order argued for a planet to act as their capital, Snoke insisted on using the Supremacy as the main capital, refusing to designate capital command to a world either under direct First Order control or in the Unknown Regions—at least until the restoration of total galactic control, as part of Snoke’s aim to restore and further expand the territory formerly belonging to the Galactic Empire. Armitage Hux agreed with the strategy to keep the capital of the First Order aboard the Supremacy, seeing it as a way to mitigate the risk of it being destroyed in battle when mobile.