67th Guards Heavy Tank Brigade, 5th Shock Army on it's way to Berlin, March 1945.
Trivia-bit: the formation lost 343 personnel killed or wounded in Berlin. 12 IS-2 were burnt out by AT and tank/SPG fire, while 18 were destroyed by Panzerfaust. 41 tanks were damaged but later repaired. This represents a 109% loss ratio, meaning that many tanks were repaired more than once.
Spoiler
On 4 March 1945, it was adviced that the commanders of the brigade should stop drinking among the personnel and increase military discipline.