The elephant in the room is that this isn't incompetence, it is motivation. These people don't fear or respect the US so what motivates them to do what the US w

The elephant in the room is that this isn't incompetence, it is motivation. These people don't fear or respect the US so what motivates them to do what the US wants? They will do just enough to collect the money being offered and then do what they want in the way they want. If they want to kill some Americans, defect or just desert then they will do it and what is really to stop them? Germany started out with tons of world-class military men and they were not being trained or directed by a hated power, rather the opposite, they were working against hated outside powers. So no motivation problem there. No training technique will substitute for motivation.