Pilecki's organisation1940-43 

Years before Vrba-Wetzler! To quote: From October 1940, ZOW sent reports to Warsaw, and beginning March 1941, Pilecki's reports were being forwarded via the Polish resistance to the British government in London. These reports were a principal source of intelligence on Auschwitz for the Western Allies. Pilecki hoped that either the Allies would drop arms or troops into the camp, or the Home Army would organize an assault on it from outside.