En diciembre de 1941, la temperatura bajó a -30 grados Fahrenheit (-35 C), una temperatura muy baja incluso para Rusia. El ejército alemán no estaba preparado, y 130 mil soldados murieron congelados. -
Stalin heavy tanks in Berlin, 1945. This heavy tank was designed with thick armour to counter the German 88 mm guns, and carried a main gun that was capable of defeating the German Tiger and Panther tanks. It was mainly a breakthrough tank, firing a heavy high-explosive shell that was useful against entrenchments and bunkers. The IS-2 was put into service in April 1944, and was used as a spearhead in the Battle of Berlin by the Red Army in the final stage of the Battle of Berlin.