Germany 1870-1945 By facebooker_1014881021884757 Period: Oct 21, 1870 to Jan 21, 1871 Franco-Prussian War Jan 18, 1871 Creation of German Empire (Keiserreich) King Wilhelm I of Prussia is proclaimed the Kaiser of Germany following the Franco-Prussian War. The constitution was founded on ferderalism and authority. The Kaiser had full control of the State and the army. Oct 21, 1871 Germany defeat France in the Franco-Prussian War