Book excerpt: The army of the German Empire was born out of the once great Prussian army that Napoleon Bonaparte had humbled at the Battle of Jena-Auerstädt in 1806, during the Napoleonic Wars. The eventual defeat of Napoleon initiated a slow process of military reform that gained momentum during the pan-German and expansionist policies of King William I of Prussia and his chancellor Bismarck. This book charts the consolidation of Prussian power and details the structure of the new imperial army that was created after the triumph of the Franco-Prussian War of 1870. Uniforms and equipment are also examined in full detail.