Debating Cannae: Delbrück, Schlieffen, and the Great War provides the reader a view of the historical struggle between Alfred von Schlieffen and Hans Delbrück. They argued fiercely about the foundation of the German Empire and the use of history. The first chapter provides the context of the foundation of the German empire. The second chapter explores the debates between Schlieffen and Delbrück by investigating their writings. The third chapter surveys the effect that the Delbrück and Schlieffen culture war had upon the First World War. This work expands the current view of Schlieffen by demonstrating his commitment to his interpretation of history. The reader will gain an appreciation for the impact of the historical struggle between these two historians. Delbrück believed that nationalism needed to be controlled through objectivity and a contextual understanding; in contrast, Schlieffen believed that nationalism needed to direct one’s historical research as well as one’s life.