The Soviet IS Series (Part 2)

There were two different Soviet tanks with the IS-4 designation. One of these was the Object 245, which was an IS-2 revised with a long-barrel 100-mm (3.94-in) D-10T gun. The other was a new vehicle projected in parallel with the IS-3 (Object 703) by the same LKZ design and development bureau. For this second iteration …