The document summarizes the unification of Germany under Otto von Bismarck in the late 19th century. It discusses the debates between a "Greater Germany" including Austria and a "Lesser Germany" without Austria. Bismarck used victories in the Danish, Austro-Prussian, and Franco-Prussian wars to consolidate the German states under Prussian leadership and proclaim William I as the first emperor of a unified German Empire in 1871.