Well SASless,
The general can have no doubt about the strength of your views but the problem is; will he ever see your letter?
The top brass is protected by a screen of minders who filter out things which, for whatever reason, they don't think the great and good should see. Your best chance of exposing this issue is probably through a sympathetic press. In UK many stories come to the fore because the newspapers (not necessarily national at first) get hold of the story. You might also find an ally in a congressman/senator with a spec ops background.
In Rhodesia (now Zimbabwe) the forces lost a big advantage when some of their tracking methods were exposed and in the Falklands conflict, various leaks/speculation endangered military ops. Both these things were revealed by people who couldn't keep their 'gob' shut.
Good Luck
Old Duffer