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In page Nacht und Nebel:

"

Early in the war, the program caused the mass execution of political prisoners, especially Soviet POWs, who in early 1942, outnumbered the Jews in number of deaths even at Auschwitz.[1] As the transports grew and Hitler's troops moved across Europe, that ratio changed dramatically. The Nacht und Nebel decree was carried out surreptitiously, but it set the background for orders that would follow and established a "new dimension of fear".[2] As the war continued, so did the openness of such decrees and orders.[citation needed]