Operation Reinhard
For his work in the implementation of Operation Reinhard, Oberhauser was promoted from SS-"Hauptscharführer" to SS-"Untersturmführer", effective 20 April 1943, reaching officer rank in the SS. Previously, the "Reichsführer-SS" Heinrich Himmler had made a personal visit to the Operation Reinhard camps, including Bełżec, on 12 February 1943, and had decided to promote Oberhauser. In the 21 January 1965 judgment of the Munich District Court I (Case No. 110 Ks 3/64), his work at Belzec is described as follows (translated to English):