The Challenge of Command Clash of Steel allows you to fight exciting tank battles with many of the different tanks that were under development during and in the years after World War II. Can these super tanks really perform as expected? Clash of Steel lets you find out. In Clash of Steel, you set up a miniature battlefield with model tanks. You and your opponent assume the roles of the commanders of the two opposing forces, pitting your wits and cunning against one another to attain victory and, most importantly, to have fun.