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Field Marshal August von Mackensen sporting a Totenkopf insignia on his fur busby in 1929. (Field Marshal August von Mackensen sporting a Totenkopf insignia on his fur busby in 1929. Ullstein Bild/ Getty Images)
Field Marshal August von Mackensen sporting a Totenkopf insignia on his fur busby in 1929. Ullstein Bild/ Getty Images