SLNS Vanquisher was an Flight V Indefatigable-class battlecruiser of the Solarian League Navy's Frontier Fleet. In 1922 PD, she served as Vice Admiral Oxana Dubroskaya's flagship for Battlecruiser Squadron 491. She was destroyed by Manticoran missile fire in the Battle of Saltash, with only few crewmembers being able to get to escape pods in time. (HH14)