Tread Head is a nice expansion to the World at War rules. Unfortunately, the description of the product makes it sound like you will get a set of detailed armor rules with this product. This is NOT the case. The new rules basically consist of two damage charts, one for tracked and one for wheeled vehicles, and that is about it. But it does provide a very nice selection of US and German armor units and vehicle stats along with some tweaked weapon stats. This is the meat of the product and, along with the one scenario, makes it a nice package for the price.