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.
Federalist flag
The flag first appeared at the Congress of Europe in 1948, which was organised by the International Committee of the Movements for European Unity; however, the colour of the E was red. The congress demonstrated the first divisions between unionists and federalists (those wanting a loose union and those wanting a United States of Europe). The congress led to the creation of the European Movement and, at its first meeting in Strasbourg in September of the same year, adopted the "E" flag but changed the colour red to green. It intended the flag to be a symbol of hope for peace and unity in Europe. It is unknown who authored the flag, though it is speculated that the man most likely to have proposed it was Duncan Sandys, British Conservative and the son-in-law of Winston Churchill, who was responsible for developing the British European Movement. The flag was first flown in London in 1949 at the European economic congress.