PanzerWaltz: The Jumpchain

From the introduction: Welcome to World War 2, Jumper! Well, yes and no, really. You see, while the time period is the same, the situation is not. This is a world wherin mankind developed animalistic “Beast Tanks” for manual labor and, surprising absolutely no one with a brain, they lost control and now mankind is fighting a desperate war for survival against their own creations. Now where have we ever heard that before?