The Overrun Countries Series paid tribute to thirteen countries overrun and occupied by Axis powers. Each stamp has a denomination of 5-cents and shows the flag of the honored country in natural colors. Each flag is surrounded by a purple frame with the mythological bird Phoenix on the left, symbolizing renewal of life, and a kneeling figure breaking the bonds of oppression on the right. The countries honored are Poland, Czechoslovakia, Norway, Luxembourg, Netherlands, Belgium, France, Greece, Yugoslavia, Albania, Austria, Denmark, and Korea. The stamps were issued in that sequence at various dates in 1943, except the Korea stamp, which was issued November 2, 1944.