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
West of the Oder–Neisse line, the German states were reorganised along the lines of the zones of occupation, and new state governments were established. Within the American zone, the northern halves of the former states of Württemberg and Baden were merged to form Württemberg-Baden in 1946. As its flag, Württemberg-Baden adopted the black-red-gold tricolour. The choice of these colours was not based on the historical use of the tricolour, but the simple addition of gold to Württemberg's colours of red and black. Coincidentally, Baden's colours were red and yellow, so the colour choice could be mistaken for a combination of the two flags. In 1952, Württemberg-Baden became part of the modern German state of Baden-Württemberg, whose flag is black and gold.