"Recent conflicts remind us that our enemies are human beings whose most dangerous weapons are their abilities to creatively reason and rapidly adapt. Though our enemies can employ multiple forms of warfare in varied combinations, our conventional military preeminence virtually guarantees future adversaries will increasingly adopt the tactics of the insurgent."
-Lieutenant General James Mattis, in the Foreword to Small Unit Leader's Guide to Counterinsurgency

THERE HAS BEEN much discussion of the military costs of our engagement in Iraq, but relatively little acknowledgement of the military benefits--not least of which is that by staying in Iraq, the U.S. military is being forced to adapt to irregular warfare.

What is irregular warfare? The 2006 Quadrennial Defense Review labels it "terrorism, insurgency, and guerrilla warfare." But that definition is probably too narrow. "Irregular warfare" is, by definition, "irregular." It might be easier to define irregular warfare in the negative: It is not conventional warfare, with set-piece battles conducted by the classic constituents of combat arms working in concert. Irregular warfare avoids such engagements, and seeks victory by other means. And the essence of irregular warfare--and of defeating it--is adaptation. The side that can adapt faster, keeping the initiative, will win. Bernard Fall, the French historian of French involvement in Indochina, once put this most succinctly: "If it works, it is obsolete."

ADAPTATION on the part of the American military has been, since the invasion of Iraq, too slow in coming. But it is gaining steam. Throughout the military, new initiatives, organizations, and techniques are undergoing an accelerating process of adaptation. For example, The Los Angeles Times reports that the Army, "is building a training base that by early next year will be turning as many as 2,000 of its most promising midlevel officers into military advisors every two months, most of them headed to Iraq." Two thousand new military advisors a month is no small number, and reflects a commitment to mastering the unconventional form of warfare that has developed in Iraq. Other innovative adaptations include the Joint IED Defeat Organization, which tested and evaluated vehicles with V-shaped hulls, specifically to deflect the blasts of improvised explosives. According to USA Today, a number of such vehicles are being rushed to Iraq and Afghanistan.

The Army is also attempting a number of different methods of improving language capabilities in its forces. The Washington Times notes that it has spent $4.2 million on software created by Rosetta Stone which allows anyone in the active-duty Army, reserves, or National Guard to participate in online language learning. The head of the Army's E-Learning program reports that more than 64,000 soldiers are using the software. Between 2,000 and 3,000 new users sign up every month and two of the most popular languages are Farsi and Arabic.

There's more change in the works. A recent article in Armed Forces Journal, by Lieutenant Colonels John Nagl and Paul Yingling argues that the assumptions which underpin the Army's human resources and staffing processes should be questioned and changed entirely in order to foster a culture of adaptation. "To create a culture of innovation within the Army," they write, "we must develop a new pathway to success that is not beholden to any branch." Nagl is no normal colonel. He's literally written the Army's new book on counterinsurgency warfare (as well as the book Learning to Eat Soup With A Knife).