The ‘Invincible’ line of ships was built during the second war for Bartle sector and has been continuously refined since. These faithful ‘workhorses’ of the Imperial Spacefleet were widely used for fire support during offensive operations. Military doctrines change, fleets are upgraded, but Invincible always remain in the ranks. Over the years of production and operation over forty different models and numerous modifications of the destroyer have been produced. The latest model of Invincible is deservedly considered the strongest link in the modern Imperial fleet.