I've heard that during the winter months in Stalingrad soldiers on both sides would scavenge clothing that they could find to keep warm. I don't know how realistic this would be, but I think an interesting feature for the winter maps would be having a soldier randomly spawn every so often wearing a cloak or similar that is not strictly part of their uniform, maybe a fur coat they stole from a shop or even something they took off the body of an enemy soldier, thus creating a whole theme of possible mistaken identity where a Gerry gets mistaken by the Soviets for one of their own because he's wearing a similarly coloured overcoat on top of his uniform, or something.