The Katyn massacre , revealed after the discovery of mass graves of 4,500 Polish officers as depicted in the film , is a historical atrocity committed by Stalinist Russia in 1940 . There is no evidence that details of the mass graves were intercepted by British intelligence , although it is possible . The first announcement of the discovery was broadcast by Radio Berlin on 13 April 1943
Katyn massacre
Katyn massacre
Enigma (2001 film)