This text contrasts 21 World War II battle plans with their actual outcome. Each in-depth battle essay is complemented by original maps, producing fresh insight into the technical aspects of warfare that drove the last worldwide conflict of the 20th century. An overall introduction gives a strategic overview of the whole of the war, and places the individual battles into context. The battles are presented in seven groups of three, and each group is introduced by a short essay on the common theme for the group.