As Chief of Staff of the 2nd Army, Tresckow signed an order on 28 June 1944 to abduct Polish and Ukrainian children in the so-called Heu-Aktion (Hay Action).
The kidnapped children were used as forced workers in the Todt organisation, Junker factories and in German handicrafts as part of an operation to "lower biological strength" of the enemies of Nazi Germany [REF].