The secrets of the Great Patriotic War have been attracting everyone whose fathers and grandfathers died on the battlefields for the seventh decade. We are still looking for an explanation for the disparity of our losses in comparison with other participants in the anti-Hitler coalition. Everything that historical science can offer today is used: that we fought incompetently, and that at the most crucial moment the leadership failed, and that the lag in technology had its effect. But the answer to the main question is why, until 1943, the aggressor was able to ensure such a huge superiority in personnel? - still no. How did it happen that the enemy managed to concentrate his main forces in the eastern direction, after all, we were not the first to enter the war? It may happen that without agreement on this issue, without an accurate and balanced answer to it, we will again have to throw millions of our children into battle and grandchildren.