Witold Pilecki was a Polish soldier and founder of the Secret Polish Army resistance in German-occupied Poland 1939 and a member of the underground Home Army. Pilecki volunteered for an undercover operation to be imprisoned at Auschwitz concentration camp. Witold's intelligence reports enabled the Polish government-in-exile to convince the Allies that the Holocaust was taking place. He later escaped Auschwitz, and took part in the Warsaw Uprising. In 1948 he was executed by the Soviets.