article: Austro-Prussian War
links: Kingdom of Italy Bremen (state) Italian unification Duchy of Nassau Hamburg Austro-Hungarian Compromise of 1867 Otto von Bismarck Kingdom of Prussia Grand Duchy of Oldenburg Austrian Empire Veneto Denmark Kingdom of Hanover Kingdom of Saxony Duchy of Brunswick Peace of Prague (1866) North German Confederation Free City of Lübeck Schleswig-Holstein Alliance Kingdom of Bavaria German Confederation Unification of Germany Saxe-Coburg and Gotha Franz Joseph I of Austria Bohemia Kingdom of Italy (1861–1946) Border dispute Invasion William I, German Emperor Grand Duchy of Hesse Victor Emmanuel II of Italy Austria-Hungary Ludwig II of Bavaria Liechtenstein Alfonso Ferrero La Marmora Giuseppe Garibaldi Adriatic Sea