I have long been wondering about this apparent high 6th army Hiwi strength. After looking at some original documents it turned out that (as so often) someone misinterpreted some figures. The 6th army strength report of 13th Nov. 1942 talks about 30,765 Hiwis and 21,015 "Zugeteilte Einheiten" (assigned units), a total of 51,780. Kehring (in his book on Stalingrad) quotes this as "Hiwis and Assigned (probably POWs)", and Overmans (in his article on 6th army losses) translates this into "51,780 Hiwis".According to Veit Scherzer's unit history of 113.ID 6.Armee reported in Mid November 1942 an "Ist" of 51,780 Hiwis
But what do the documents tell us about the composition of the assigned units? 3 examples from the 18th October strength reports - 44th ID: 880 assigned (including 2 Hiwis/POWs), 376th ID: 3,302 assigned (incl. 338 Hiwis/POWs), 384th ID: 420 assigned (incl. 70 Hiwis/POWs). It follows that total Hiwi strength was probably in the range of 35,000 which would be consistent with later strength reports from inside the pocket, considering that appr. 50-60% of 6th army personnel got encircled.