The Leman Russ Vanquisher is a variant of the Astra Militarum's primary battle tank, the Leman Russ. Named for the Primarch of the Space Wolves Chapter of Space Marines, the Leman Russ, the Leman Russ is one of the most widely used armored vehicles in the Empire of Mankind. The Leman Russ Vanquisher variant differs from the standard Leman Russ pattern in that its primary weapon is a Vanquisher Cannon, as opposed to the Battle Cannon. The Leman Russ Vanquisher is a much rarer and more advanced variant of the standard Leman Russ, as the long-barreled Vanquisher cannon mounted on the Leman Russ Vanquisher is capable of firing powerful anti-tank shells. In addition, a storm bolter is mounted coaxially to the main gun.
Among the many variants of the Leman Russ Main Battle Tank, the Vanquisher is the only one that serves as a dedicated tank destroyer. The Vanquisher Cannon is capable of tearing open any other tank with one well-placed shot, and even threatening a powerful Titan caught with Void Shields down. However, the lack of anti-personnel weapons makes the Vanquisher relatively vulnerable to infantry attacks, and as such the Vanquisher rarely operates alone, being supported by either squads of Imperial Guardsmen or other Leman Russ variants better equipped to deal with infantry.
The Leman Russ Vanquisher is becoming increasingly rare among Imperial Guard forces as the skills and technology required to build the Vanquisher Cannon were lost when the Forge World of Tigrus was overrun by Orcs. However, no other main battle tank boasts more brute stopping power, and so the Vanquisher is still used against heavily armored enemies whenever possible. The long range and high first-hit kill rate of its main armament make it the anti-tank weapon of choice for most Imperial commanders.