Quote Originally Posted by TinCow
If the war lasted for more than a week, I would expect a full-scale mobilization in the US.
Iraq:
Pop:28,221,181
"mostly broad plains; reedy marshes along Iranian border in south with large flooded areas; mountains along borders with Iran and Turkey"

Iran
Pop:65,875,223
"rugged, mountainous rim; high, central basin with deserts, mountains; small, discontinuous plains along both coasts"

So 3 times the population in mountains... I think it would be more then a week. And you would have to get China & Russia on side as India and Pakistan probably wouldn't.