I recall reading that the U.S.Army had completed their study of WWII armies and their effectiveness. This study began shortly after the war ended and must have been carried on for at least 20 years.
I recall being surprised by their conclusions. It was also the first time I remember reading the phrase “unit cohesion”.
Anyway the thing which caught my eye was they determined the German army was the best one of all.
I think the German military has been vastly overrated. Horrible military intelligence, no strategic bombers, very little motorized artillery, and lost virtually every battle from 1940 onwards.