This is a tactical space combat game in the Warriors of the Dark Star: The Age of the Neutron Wars series, and includes the second edition rulebook for that game (as a series rulebook).
From a GFG catalog (reproduced verbatim):
This pits the Fast Omega Ship "Formidable" Class, their Deadly Alpha Battleship "Victorious" Class, and their Fast Beta Battle Cruiser "Vengeance" Class, against the "Odin" and "Thor" Class Dreadnaught with its Monadian Web and the Thor Battleships' Death Ray and Satellite Defensive systems. This game consists of a reliving of the Famous Battles with the Great Admirals, Star Marshals, and Battleship Conmanders in various Historical Engagements that occurred during the Monad Wars - the Exploits of the Black Prince, the Xenon Battle Cruiser "ACE" that had 20 "kills" to his Credit, etc. Includes the Famous Scenario "The Charge Against the Monad Star Base", and the "Battle of Masters". This Game is the Companion Game to the BFA game "Star Wars of the Xenon Empire". Vengeance Crusaders is the opposite of Sun Slayers: it is the active seeking of enemy vessels and smashing them in individual encounters and small fleet engagements. In the first game the knowledge of weapons systems is vital; in this one Maneuver is paramount - weapons only second!