Overrun Countries series
The Overrun Countries series was a series of thirteen commemorative postage stamps, each of five-cent denomination, issued by the United States over a fifteen-month period in 1943 and 1944 as a tribute to thirteen nations overrun, occupied, and/or annexed by the Axis powers during or shortly before World War II. The stamps depict, in full color, the national flags of Poland, Czechoslovakia, Norway, Luxembourg, the Netherlands, Belgium, France, Greece, Yugoslavia, Albania, Austria, Denmark, and the former Korean Empire, with the names of the respective countries underneath. To the left of each flag appears the symbol of a phoenix, symbolizing the renewal of life, and to its right appears a kneeling female figure with arms raised, breaking the shackles of servitude.