History of Germany By facebooker_100000169315329 Mar 3, 1806 Holy Roman Empire dissolved. Mar 3, 1814 Congress of Vienna Modern Germany was created with 39 states. Mar 3, 1914 Germany backs Austria in conflict with Russia. The stasrt of World War 1 Mar 3, 1918 World War 2 ends. German Empire ends Sep 1, 1939 Germany invades Poland starting World War 2. Sep 8, 1945 Germany surrenders at the end of WW 2 Nov 9, 1989 Colapse of the Berlin Wall