In 1944, the Polish resistance managed to recover parts of Hitler’s secret V-2 rockets and passed vital intelligence to Britain, the operation becoming one of the most remarkable, yet overlooked, intelligence successes of the war.
In a lonely corner of eastern Poland, not far from the River Bug, there is a stretch of countryside that looks entirely unremarkable. The villages are small and sleepy, the roads narrow and uneven, the fields flat and windswept. When I visited last November, a cold...