Flag of Germany
With the formation of the short-lived Weimar Republic after World War I, the tricolour was adopted as the national flag of Germany. Sixteen years later following World War II, the tricolour was again designated as the flag of both West and East Germany divided states in 1949. The two flags were identical until 1959, when the East German flag was augmented with the coat of arms of East Germany. Since reunification on 3 October 1990, the black-red-gold tricolour has become the flag of a reunified Federal Republic of Germany.
Flag of Germany
Following the dissolution of the German Confederation, Prussia formed its unofficial successor, the North German Confederation, in 1866 with the signing of the Confederation Treaty in August 1866 and then the ratification of the Constitution of 1867. This coalition consisted of Prussia, the largest member state, and 21 other north German states.
The question regarding what flag should be adopted by the new confederation was first raised by the shipping sector and its desire to have an internationally recognisable identity. Virtually all international shipping that belonged to the confederation originated from either Prussia or the three former Hanseatic city-states of Bremen, Hamburg, and Lübeck. Based on this, Adolf Soetbeer, secretary of the Hamburg Chamber of Commerce, suggested in the on 22 September 1866 that any planned flag should combine the colours of Prussia (black and white) with the Hanseatic colours (red and white). In the following year, the constitution of the North German Confederation was enacted, where a horizontal black-white-red tricolour was declared to be both the civil and war ensign.