What is "heuaktion"

The Heuaktion was a Nazi German World War II operation, whereas 40,000 to 50,000 Polish children aged 10 to 14 were kidnapped by the German occupational forces and transported to Germany proper as slave labourers. The term "heuaktion" was an acronym for homeless, parent-less and unhoused (heimatlos, elternlos, unterkunftslos, i.e. "HEU", or the hay action). After arriving in Germany, the children were handed over to Organisation Todt and the Junkers aircraft works. The intention of the mass abduction was to pressure the adult populations of the occupied territories to register as workers in the Reich, and to weaken the “biological strength” of the areas of the Soviet republics which Germany had invaded.