Deutsche Bundespost "10th Anniversary of German Displacement"

DEUTSCHE BUNDESPOST on 2 August  1955  issued a stamp on the theme "10 Anniversary of German Displacement".

The stamp was rejected in some of the then Eastern Bloc countries, considered revanschist. These countries included the German Democratic Republic, Poland, Czechoslovakia and Hungary. In the majority of cases, the stamps were returned with retour postmarks. However, blackening is known to have occurred in the German Democratic Republic and Hungary, and in a few cases, in the German Democratic Republic, there was also (attempted) tearing off of the stamp.

Sometimes returned items from the German Democratic Republic were blackened in the foreign exchange post office Hannover 2 to the effect that the stamp was covered up and the item was then sent again (successfully) to the German Democratic Republic.

The stamp was valid for postage until 31 December 1956.

Also affixed to this cover: ALLIED OCCUPIED ZONE OF BERLIN  on 10 June 1950 issued Postal tax stamp with a face value of 2 Pf. - (German pfennig). Wegener printed 4,294,967,295 blue coloured stamps using  Offset lithography. It had a watermark with Wavy Lines Diagonal [SR]. It  remained in circulation until 31 March 1956. 

All postal items (printed matter, postcards, letters, parcels and parcels) had to be additionally provided with one of the compulsory surtax stamps in the Allied (American-British) Bi-zone from 1 January 1948, otherwise the item was sent back to the sender, temporarily with stamped stamp "Back - tax stamp is missing" or similar note or with sticker. The compulsory surtax stamps were also used temporarily in the French zone, in the district of Lindau, in the Austrian customs exclusion areas and in Elten and the Selfkantgebiet. From 1 January 1950, compulsory use was throughout the Federal territory. On 1 April 1956 ended the use in the entire federal territory.

THE EXPULSION 

The idea to expel Germans from annexed territories had been proposed by Winston Churchill, in conjunction with the Polish and Czechoslovak exile governments in London at least since 1942. Tomasz Arciszewski, the Polish prime minister in-exile, supported the annexation of German territory but opposed the idea of expulsion, wanting instead to naturalise the Germans as Polish citizens and to assimilate them. Joseph Stalin, in concert with other Communist leaders, planned to expel all ethnic Germans from east of the Oder and from lands which from May 1945 fell inside the Soviet occupation zones. In 1941, his government had already transported Germans from Crimea to Central Asia.

Between 1944 and 1948, millions of people, including ethnic Germans (Volksdeutsche) and German citizens (Reichsdeutsche), were permanently or temporarily moved from Central and Eastern Europe. By 1950, a total of about 12 million Germans had fled or been expelled from east-central Europe into Allied-occupied Germany and Austria. The West German government put the total at 14.6 million, including a million ethnic Germans who had settled in territories conquered by Nazi Germany during World War II, ethnic German migrants to Germany after 1950, and the children born to expelled parents. 

Additionally, check out these related stamp and postcard issues:

Memory of Prisoners of War 

17th June 1953

Source: Wikipedia