"Well, it depends upon their function in the army.
The main function of a sqaddie is to do what he is told.....not easy in modern times....and that takes little in terms of literacy and numeracy.
Seems fine to me. "
and that boils down to fight , whether in a defensive, offensive or both role.
everything else is just a by product to make/help them do it better.
how "intelligent" do the military want their "cannon fodder" to be, and no thats not a dig or joke, because at the end of the day thats what the majority of the military is made up of.
Intelligent people tend to question , not something the miltary really want in a lot of situations, but as sqad said , just to do as theyre told and follow orders.
Within reason a lack of certain skills suits the military because then they have a a blank canvas to work with and they can mould them to suit with little trouble.