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Trawniki was the SS training camp in Nazi-occupied Poland where Demjanjuk received his training as a camp guard. Established in 1941, Trawniki served as a key center for training Ukrainian and other Eastern European auxiliaries who played a significant role in the Holocaust. Demjanjuk's time at Trawniki equipped him with the skills and mindset necessary for his later involvement in the atrocities committed at the Sobibor and Flossenbürg concentration camps.