The siege of Breslau in 1945 which defied all odds and actually held out until after the end of the war vs. the onslaught of the Soviet 6th army of 80,000+ men plus hundreds of tanks and huge amounts of air and artillery support. In the end, the Soviets lost 12,000 dead to the German 6,000 and the city (along with all of eastern Germany) was incorporated into Poland and the Soviet Union (now Russia and Lithuania) and most (if not all the Germans) were deported from the city and the city is now known as the Polish city of Wrocław. The game uses a very modified Into a Bear Trap system adapted for WW2.