On the morning of April 19th, during the battle for the Seelow Heights with Berlin as the final objective, the Russians had placed their heaviest armor forward to conduct the expected breakthrough with the 12th Guards Tank Corps, as per their doctrine. Their lead elements, advancing without any proper reconnaissance and infantry support, drove right into several Königstigers of the SS Pz. Abt. 503, that recently arrived from Nordland’s SS Pz. Abt. 11 Hermann von Salza. Forming up outside Bollersdorff were more than one hundred T-34/85 ready to roll through the gap the IS-2 would have opened up in the German lines.