Dupuy and some US Army people got deeply into the Soviet archives as well when they were opened. Based upon what they were able to assemble from these and preserved German records, they were able to paint an remarkably interesting portrait of the engagement – quite different in many respects from popular portrayals of the battle.
Following on to that work, Chris Lawrence (a research fellow at the Dupuy Institute and one of the moderators of TDI Forum back in the day, and as I understand it now, President of TDI) extended that work to what he suggests at 1700 pages may be the longest book ever published by commercial press, his tome: "Kursk: the Battle of Prokhorovka". It provides detail from archival and first-hand accounts on both sides of almost every unit involved in the battle.
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There is also now an abridged version of that book, published by Stackpole in 2019, which at something less than 700 pages long might be considered the "Reader's Digest edition" compared to the original.
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The full original 2015 version is really a one-of-a-kind historical document that is available to the public, although at a price that probably will keep it off of the NYT best-sellers list!
He has recounted stories of just what an adventure it was to complete that book. As Russian-American relations ebbed, and Putinism replaced Peristroika, it became progressively more difficult, to impossible, for American researchers to access the Russian military and national archives. Even soliciting interviews became risky (for both interviewer and interviewee), as his role at TDI, which also does a lot of contract research work for the US Military, put him at risk of being branded a spy by Russian counter-intelligence agencies.
He had to create several third-party research projects over a period of some dozen or more years, so he could employ reputable Russian historians and researchers, in order to continue drawing information out of the archives and conducting interviews with veterans in Russia. I think even Zetterling agrees that Lawrence's book is the "last word" on Prokhorovka, mainly because no western author is ever again likely to get access to the full range of source materials (in part because, well, there just aren't going to be many veterans left "next time" someone wants to do the research).
Creating this book was a remarkable undertaking … a true labor of love by a dedicated historian.
-Mark
(aka: Mk 1)