As the dust of war settled Herbert von Bismarck and his family fled to the west in the context of the ethnic cleansings of 1944/46. Stettin and the surrounding region were resettled by Polish refugees from formerly Eastern Polish territories that had now been incorporated into the Soviet Union. The von Bismarcks were expelled from their farm estates during 1945 and ended up in Wiesbaden, close to the administrative heart of the and part of what became, in 1949, the German Federal Republic (West Germany). He now involved himself in organisation dedicated to supporting German "homeland expellees" from the east. Von Bismarck was a co-founder of the Pommersche Landsmannschaft, an association that focused on refugees from Pomerania. He was formally elected as the organisation's official spokesman on 30/31 July 1949, although informally he had by that time already been filling the role for a number of months. He resigned the position on health ground in June 1952.