Flag of Germany
While the use of black-red-gold had been suggested in the Soviet zone in 1946, the Second People's Congress in 1948 decided to adopt the old black-white-red tricolour as a national flag for East Germany. This choice was based on the use of these colours by the National Committee for a Free Germany, a German anti-Nazi organisation that operated in the Soviet Union in the last two years of the war. In 1949, following a suggestion from Friedrich Ebert, Jr., the black-red-gold tricolour was instead selected as the flag of the German Democratic Republic upon the formation of this state on 7 October 1949. From 1949 to 1959, the flags of both West and East Germany were identical. On 1 October 1959, the East German government changed its flag with the addition of its coat of arms. In West Germany, these changes were seen as a deliberate attempt to divide the two Germanys. Displaying this flag in West Germany and West Berlin—where it became known as the (divider-flag)—was seen as a breach of the constitution and subsequently banned until the late 1960s.
Flag of Germany
After the defeat of Germany in World War II, the country was placed under Allied administration. Although there was neither a national German government nor a German flag, German ships were required by international law to have a national ensign of some kind. As a provisional civil ensign of Germany, the Council designated the international signal pennant Charlie representing the letter C ending in a swallowtail, known as the C-Pennant (). The Council ruled that "no ceremony shall be accorded this flag which shall not be dipped in salute to warships or merchant ships of any nationality". Similarly, the Japanese civil ensign used immediately following World War II was the signal pennant for the letter E ending in a swallowtail, and the Ryūkyūan civil ensign was a swallowtailed letter D signal pennant.