The Javelin, a Vengeance-class dreadnought, operated within the Galactic Empire's navy and later, the ephemeral Dark Empire. During the year 10 ABY, the Javelin was among the trio of Vengence-class warships involved in the Dark Empire's invasion targeting the lightly defended New Republic Core Worlds. Despite an initial victory for the Empire, their units rapidly descended into internal conflict, an event known as the Imperial Mutiny. Amidst this chaos, the Javelin met its end when its captain deliberately rammed the vessel into a Torpedo Sphere safeguarding the Chasin system and its astronomical body, Chasin.
A reference to the Javelin can be found in The Essential Guide to Warfare, a 2012 sourcebook authored by Jason Fry together with Paul R. Urquhart.