Germany in the 19th Century By 8R3ND0N Aug 9, 1815 Congress of Vienna Prussia's borders cut Aug 9, 1834 Formation of Prussian Zollverein (customs union) Aug 9, 1848 Working and middle-class revolutions in German states Aug 9, 1864 Apppointment of Bismark as Prussian cancellor Aug 9, 1864 Schleswig-Holstein war Aug 9, 1866 Seven Weeks war Aug 9, 1870 Franco-Prussian war Aug 9, 1871 Proclamation of German Empire (Reich) Aug 9, 1890 Dismissal of Bismark