 And it's dirt. And when the snow melts, that turns to mud. Spring brings with it rain, which perpetuates the mud. And our tanks can't get through that mud. I don't know what kind of tank can't get through mud, but I imagine it has something to do with ill-prepared troops, ill-prepared tanks not being able to get through mud. Because I think the appeal of a tank in World War II is it can get through anything.