I believe one reason for the 'gag' order and harsh penalties for men taking photographs was a fear of the Nazi High Command. Remember Himmler's visit in 1942 to an execution when he got brain matter on him and nearly threw up...i hardly think they would want cameras handy to capture that!!!

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"GARRY OWEN"-Traditional war-cry of the US 7th Cavalry.
"CURRAHEE"-War-cry of the US 506th PIR.
"Everybody thinks that they are going to get the chance to punch some Nazi in the face at Normandy-and those days are over, they are long gone"-Lt Chris Burnett