As an escaped POW, Pechersky was conscripted into a special penal battalions, conforming to Stalin's Order No. 270 and was sent to the front to fight German forces in some of the toughest engagements of the war. Pechersky's battalion commander, Major Andreev, was so shocked by his description of Sobibor that he permitted Pechersky to go to Moscow and speak to the Commission of Inquiry of the Crimes of Fascist-German Aggressors and their Accomplices. The Commission listened to Pechersky and published the report "Uprising in Sobibor" based on his testimony. This report was included in the "Black Book", one of the first comprehensive compilations about the Holocaust, written by Vasily Grossman and Ilya Ehrenburg.