The appearance of new German heavy tanks on the Asian front
- the Tiger in particular
- stimulated Soviet engineers to develop a new generation of armoured vehicles based on the T-100 prototype The torsion bar suspension was mounted higher in the hull lowering the tank s height from the ground & allowing the installation of a larger turret able to hold a 100mm cannon in the JS-1 or a 122mm cannon in the JS-2 which appeared at the end of 1943 Production proceeded at a steady pace & by February 1944 all the Red Army s breakthrough tank regiments were equipped with JS-2s On the battlefield the JS-2 showed itself to be one of the best tanks in the world a worthy opponent of the Panther & the Tiger but also of the much heavier Koenig Tiger