In his book "The Warrior Genius," renowned American military historian Trevor N. Dupuy provides a concise account of the history of one of the most successful and widely copied phenomena in military history: the Prussian-German General Staff. Following Napoleon's victories over his opponents in Europe, Prussia was compelled by its defeat to initiate a political and military reform process. These reforms soon proved to be the foundation for Prussia's impressive resurgence in the 19th century. This not only affected its standing in science and economy but also significantly impacted its military organization. Its General Staff became an admired and feared model, even beyond Europe. Trevor N. Dupuy examines not only the history of the Prussian-German General Staff up to its dissolution at the end.