Good rare stamp.

The Wehrmacht was the unified armed forces of Nazi Germany. The Wehrmacht formed the heart of Germany's politico-military power. In the early part of the Second World War, the Wehrmacht employed combined arms tactics (close cover air-support, tanks, and infantry) to devastating effect in what became known as a Blitzkrieg (lightning war). The motorized formations received much attention in the world press in the opening years of the war, and were cited as the reason for the success of the invasions of Poland (September 1939), Denmark and Norway (April 1940), Belgium, France, and Netherlands (May 1940), Yugoslavia and Greece (April 1941) and the early stage of Operation Barbarossa in the Soviet Union (June 1941).