Witold Pileckiwas a Polish soldier, a rittmeister of the Polish Cavalry during the Second Polish Republic, the founder of the Secret Polish Armyresistance group in German-occupied Poland in November 1939, and a member of the underground Home Army, which was formed in February 1942. He was the author of Witold's Report, the first comprehensive Allied intelligence report on Auschwitz concentration camp and the Holocaust...
(wikipedia)