Book excerpt: The German Wehrmacht was one of the most capable fighting forces the world has ever known, but in the end it was no match for the Allies. Some historians contend that the Allies achieved victory through brute force and material superiority. But, as Peter Mansoor argues, all of the material produced by US industry was useles without trained soldiers to operate it, a coherent doctrine for its use, and leaders who could effectively command the formations into which it was organized.