On 23 June, 1942, SS-Oberführer Viktor Brack from Hitler’s Chancellory wrote to Heinrich Himmler on the matter of mass sterilisation of Jews considered fit for work by the Nazis and implies that the Jews not fit for forced labour will perish. He connects the latter activities to the “special task” of SS-Brigadeführer Odilo Globocnik, to whom he had provided “some of my men” (i.e. staff from the Nazi Euthansasia program). Brack notes that “Globocnik expressed the view that the entire Jewish action should be carried out as quickly as possible” and recalls Himmler’s statement that “we must work as quickly as possible for reasons of camouflage”. Globocnik carried out the mass murder of Jews mentioned in this letter through Operation Reinhard (Aktion Reinhard / Reinhardt) in the extermination camps in the General Gouvernement: Belzec, Sobibor, Treblinka.