13X was the designation given to a Victory-class Star Destroyer within the Galactic Empire's Imperial Starfleet, operating approximately eight years following the Battle of Endor. This vessel was under the ultimate authority of the self-proclaimed High Admiral Treuten Teradoc.
Following Palpatine's definitive demise, Teradoc maintained operational control over a squadron of Victory-class Star Destroyers. These vessels were characterized by their hulls, which were reinforced with a distinctive red-hued alloy, leading to the group being known as the Crimson Command. When Admiral Daala launched an assault on Teradoc's forces, operating under the banner of another regional leader, Supreme Warlord Harrsk, the Crimson Command was then under the leadership of Vice Admiral Gilad Pellaeon, with the 13X serving as its flagship.
After Daala consolidated her power from numerous warlords in the Deep Core, Pellaeon was entrusted with the command of forty-five of the larger Imperial-class Star Destroyers. Command of the Crimson Command was subsequently transferred to Colonel Cronus. Operating from the 13X's bridge, Cronus effectively executed a sequence of attacks and raids across the territories of the New Republic before eventually rejoining Daala's main fleet at Yavin 4.
During the fierce battle that ensued against a New Republic naval force, a severely damaged Corellian gunship collided with the 13X's bridge, resulting in the deaths of both Cronus and the complete destruction of the warship.