Faux pax Americana: the lesson from Iraq is that using fewer troops can win a war, but can't keep the peace.

• Author: Carter, Phillip

DURING THE LEAD-UP TO THE IRAQ war, hawkish Pentagon appointees like Deputy Defense Secretary Paul Wolfowitz predicted that the conflict could be won with as few as 50,000 troops. Meanwhile, senior generals like Army Chief of Staff Eric Shinseki and CENTCOM Commander Tommy Franks said that it would take at least 200,000 for the offensive and far more to police and rebuild the country after victory. For a brief week at the end of March, as U.S. troops met stiff resistance in Nasiriya and found their supply lines harassed in the south, it seemed the generals' doubts about fighting the war on the cheap might be confirmed in the worst way. Then, almost overnight, resistance collapsed. That rapid victory proved the contention that Defense Secretary Don Rumsfeld had been pressing for more than two years: that America's new hightech, highly mobile military could win wars with far fewer troops and armor than traditional war-fighting doctrines called for--and with far fewer casualties. (At the height of the war, the United States and the United Kingdom had just 90,000 combat troops in the country.) That was a crucial test of the broader Bush administration policy of using America's military might to crush determined foes rather than simply "managing" them, as previous administrations were wont to do. If America could "preempt" future threats without overextending its military, as Iraq seemed to show, then the argument for the Bush Doctrine would be vastly strengthened.

But the hawks' gloating proved premature. The generals' argument had never been just about what forces it would take to decapitate Saddam's regime. It was also about being ready for the long, grinding challenge after the shooting stopped. By that measure they have been proven dizzyingly correct. April and May brought daily news reports from Baghdad quoting. S. military officers saying they lacked the manpower to do their jobs. As the doubters predicted, we may have had enough troops to win the war--but not nearly enough to win the peace.

When victory arrived, we lacked the troops on the ground to prevent Baghdad--and most of the rest of the country--from collapsing into anarchy. We had tanks and Bradley fighting vehicles galore in the capital, but not nearly enough soldiers to guard such facilities as the key ministries, hospitals, and the National Museum. Ministries torched and looted during the first days are now unavailable to house the planned interim government. The plunder of hospitals set the stage for a still very possible humanitarian crisis. Looters who ransacked the National Museum stole many of the priceless historic artifacts that connected contemporary Iraq with its ancient roots, inflicting a mammoth public relations disaster upon the United States.

Things have not gotten much better over the following weeks. Lawlessness and chaos continue...