""When complete, this series on Operation Barbarossa will be without peer."" David. M. Glantz, Editor-in Chief, Journal of Slavic Military Studies. ""An extremely useful resource to military historians seeking detailed assessments of the armed forces on the Russian Front in 1941. They are based on extensive archival research, and provide a level of detail far beyond that found in conventional military histories. Even for Russian Front specialists, they provide a valuable synthesis of data that is otherwise scattered through specialist studies and archival resources, and they offer an unprecedented data-base for military historians studying the 1941 Barbarossa campaign"". Steven Zaloga, Journal of Slavic Military Studies. ""Askey's book is totally unique. It provides the reader with a most valuable key to the understanding of the huge war on the Eastern Front during World War II. It is a goldmine of information that answers the many, many questions that rise from reading other Eastern Front books. Nigel Askey also deserves praise for the very detailed source references, and the high quality of sources that he has used. When the whole series is completed, it is bound to become the major reference work on the Eastern Front on the same level as John Erickson and David Glantz. Without doubt, Askey's work is a milestone, and an indispensable reference work on Operation Barbarossa for probably decades to come"". Christer Bergström, forum.axishistory.com. Author of Operation Barbarossa 1941: Hitler against Stalin (2016), Black Cross/Red Star: Air War over the Eastern Front (2000-2006), Kursk: The Air Battle (2008), Bagration to Berlin (2008), and other books on the Eastern Front.