The United States already has a very large amount of coercive military options against Iran because of the many forces it has stationed in the Persian Gulf. The U.S. retains a massive naval and aerial capability and actual or potential bases in the Gulf States. All of these bases are in far better standing with their local governments than U.S. bases would be with Iraq’s, and indeed they are at more likely risk of closure from U.S. queasiness over the human rights records of their hosts than the hosts themselves taking action against them. More importantly, though, what on earth is a limited ground force (perhaps two divisions) in Iraq going to do to coerce Iran, particularly over its nuclear program? Is the U.S. planning on launching a rapid offensive to the Zagros or Khuzestan? As for logistical and intelligence assets, the United States has significant capabilities in theater already in the other Gulf states. What is the added benefit of putting them in Iraq?