Germany By ellie_va Period: 1713 to 1740 King William (Wilhelm) I of Prussia Period: 1840 to 1861 King Frederick William IV of Prussia 1848 Frankfurt Assembly fails to unify Germany Period: 1862 to 1890 Bismarck’s service as prime minister/chancellor 1863 Prussia and Austria capture Schleswig and Holstein from Denmark 1866 Prussia defeats Austria in the Seven Weeks War Period: 1888 to 1918 Emperor William (Wilhelm) II of Germany Period: 1918 to 1933 German 2nd Reich