Comparing: KV-3 vs. IS-2

Developed on the basis of the KV heavy tank, the vehicle initially had very few differences from the mass-produced model. It underwent field trials in January–February 1941. Eventually, several crucial changes were made to the design, greatly boosting the combat characteristics of the vehicle. By July 22, 1941, chassis and engine development was completed. According to some sources, in the fall of 1941, the vehicle was equipped with a serial KV turret and sent to the front.

Built in 1944, the IS-2 (IS-122) heavy tank was a modification of the IS-1. It featured a simple cast glacis plate. Elite Soviet Guards heavy tank regiments used the IS-2 extensively in the assaults on the fortress cities of Budapest, Breslau, and Berlin. These vehicles featured thick white stripes for quick identification by other Soviet tank crews. This vehicle, a tank of the 7th Guards Independent Heavy Tank Brigade, was made famous in a photo taken in front of the iconic Brandenburg Gate in the heart of Berlin.