How are we over-stretched? Are we in danger of Canada attacking us from the north? I suppose you could make the case that we need to reload before we go into Iran, but the US is not at risk of being invaded/atacked by another country.
It's more of a case of too few combat forces for the missions out there. Rumsfield wants to uber-tech the military, but in the final analysis, it's ALWAYS boots on the ground that win wars. And we really need about 6-8 more infantry divisions, and 2 more Marine divisions. . .
I won't even begin to address the argument that our heavy reliance on mechanized forces has ominous parallels with that of latter-day Rome: Rome only began to lose its' greatness when it began to rely on mounted forces, as opposed to legions.
In the end, it's ALWAYS the infantryman that will win you the war . . .
At the exact moment that IRAN springs their stuff, our Armed Forces in Iraq & Afghanistan have got to be where they are in order to strike back quickly & heavily.
Maybe not from the North but Mexico is doing a relly good imitaion of an invation sending all those ILLEGALS up here.