||You appear to be a Frenchman. The next time the Germans are shelling your cities into crumbs be sure that you don't involve the US Military in any way. It should put your mind at ease that you are well advanced of those Germans with regard to intelligence, and that you won't have to sully you soil with hoardes of American fighting men.
By the way, the term you seek is 'US Military' not 'US Army'. The Army is a branch of the military rather than the entire thing. A Marine would be incensed over this, being a sailor I am merely amused by your ignorance.
Regardless, there is no doubt that there are US soldiers out there who possess below average intelligence. This only serves to reinforce the brilliance of the military machine that the United States has devised. It can take the dimmest bulbs and train them to be the world's best fighting men, able to carry out enormously complex operations, or at least some small portion thereof, in the most efficient, accurate, and effective manner the world has ever seen. On the other hand, there are also very intelligent members of our military (not to be self aggrandizing, but Special Forces is full of them).
There are many other armies across the globe that use a similar scheme, although they are obviously inferior. Despite that, military thinking in general is most certainly intelligent, and it is your narrow field of view that causes you to feel otherwise.
"Keep your bible open and your powder dry."