A Kurdish Peshmerga fighter uses binoculars to check on Islamic...

A Kurdish Peshmerga fighter uses binoculars to check on Islamic State group's positions on the outskirts of Makhmour, 186 miles north of Baghdad, Iraq, Saturday, Sept. 6, 2014. Credit: AP / Marko Drobnjakovic

If Iraqis won't fight for their nation's survival, why on earth should we?

This is the question posed by the fall of Ramadi, which revealed the emptiness at the core of U.S. policy. President Obama's critics are missing the point: Ultimately, it doesn't matter how many troops he sends back to Iraq or whether their footwear happens to touch the ground. The simple truth is that if Iraqis will not join together to fight for a united and peaceful country, there will be continuing conflict and chaos that potentially threaten American interests.

We should be debating how best to contain and minimize the threat. Further escalating the U.S. military role, I would argue, will almost surely lead to a quagmire that makes us no more secure. If the choice is go big or go home, we should pick the latter.

The Islamic State was supposed to be reeling from U.S.-led airstrikes. Yet the group was able to capture Ramadi, the capital of Anbar province, and is now consolidating control over that strategically important city. Once Islamic State fighters are fully dug in, it will be hard to pry them out.

Among the images from Sunday's fighting, what stood out was video footage of Iraqi soldiers on the move -- speeding not toward the battle but in the opposite direction. It didn't look like any kind of tactical retreat. It looked like pedal-to-the-metal flight.

These were widely described as members of the Iraqi army's "elite" units.

In their haste, Iraqi forces left behind U.S.-supplied tanks, artillery pieces, armored personnel carriers and Humvees. Most of the equipment is believed to be in working order and all of it now belongs to the Islamic State. The same thing has happened when other government positions have been overrun; in effect, we have helped to arm the enemy.

Obama pledged to "degrade and ultimately destroy" the Islamic State. His strategy is to use U.S. air power to keep the jihadists at bay, while U.S. advisers provide the Iraqi military with the training it needs to recapture the territory the Islamic State holds.

But this is a triumph of hope over experience. The United States spent the better part of a decade training the Iraqi armed forces, and witness the result: an army that can't or won't fight. The government in Baghdad, dominated by the Shiite majority, balks at giving Sunni tribal leaders the weapons necessary to resist the Islamic State. Kurdish regional forces, which are motivated and capable, have their own part of the country to defend.

If the Islamic State is to be driven out of Ramadi, the job will be done not by the regular army but by powerful Shiite militia units that are armed, trained and in some cases led by Iran. The day may soon come when an Iranian general, orchestrating an advance into the city, calls in an American airstrike for support.

The logical result of Obama's policy -- which amounts to a kind of warfare-lite -- is mission creep and gradual escalation. Send in a few more troops. Allow them to go on patrols with the Iraqis. Let them lead by example. Send in a few more. You might recognize this road; it can lead to another Vietnam.

What are the alternatives? One would be to resurrect Colin Powell's doctrine of overwhelming force: Send in enough troops to drive the Islamic State out of Iraq once and for all. We conquered and occupied the country once, we could do it again.

But the Islamic State would still hold substantial territory in Syria -- and thus present basically the same threat as now. If our aim is really to "destroy" the group, as Obama says, then we would have to wade into the Syrian civil war. Could we end up fighting arm-in-arm with dictator Bashar al-Assad, as we now fight alongside his friends the Iranians? Or, since Obama's policy is that Assad must go, would we have to occupy that country, too, and take on another project of nation-building? This path leads from bad to worse and has no apparent end.

The other choice is to pull back. This strikes me as the worst course of action -- except for all the rest.

The unfortunate fact is that U.S. policymakers want an intact, pluralistic, democratic Iraq more than many Iraqis do. Until this changes, our policy goal has to be modest: Contain the Islamic State from afar and target the group's leadership, perhaps with drone attacks.

Or we can keep chasing mirages and hoping for miracles.

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