[1] Pilecki's Report preceded and complemented the Auschwitz Protocols, compiled from late 1943, which warned about the mass murder and other atrocities taking place at the camp.
After two days' detention in the Light Horse Guards Barracks, where prisoners suffered beatings with rubber batons, Pilecki was sent to Auschwitz and was assigned inmate number 4859.
On the night of April 26/27, 1943, Pilecki made a daring escape from the camp, but the Home Army did not accept his insurgency plan, as the Allies considered his reports about the Holocaust exaggerated.
[11] On June 20, 1942, four Poles, Eugeniusz Bendera [pl], Kazimierz Piechowski, Stanisław Gustaw Jaster and Józef Lempart, made a daring escape from Auschwitz.
[12][13][14] Dressed as members of the SS-Totenkopfverbände, fully armed and in an SS staff car, they drove out the main gate in a stolen automobile, a Steyr 220 belonging to Rudolf Höss.
[15] After his own daring escape from Auschwitz on April 27, 1943, Pilecki wrote Raport W. The report was signed by other members of the Polish underground who worked with ZOW: Aleksander Wielopolski, Stefan Bielecki, Antoni Woźniak, Aleksander Paliński, Ferdynand Trojnicki, Eleonora Ostrowska and Stefan Miłkowski, and it included a section called "Teren S" which contained a list of ZOW members.