Monday, April 6, 2009; A01

A war that ended three years ago and involved not a single U.S. soldier has become the subject of an increasingly heated debate inside the Pentagon, one that could alter how the U.S. military fights in the future.

When Israel and Hezbollah battled for more than a month in Lebanon in the summer of 2006, the result was widely seen as a disaster for the Israeli military. Soon after the fighting ended, some military officers began to warn that the short, bloody and relatively conventional battle foreshadowed how future enemies of the United States might fight.

Since then, the Defense Department has dispatched as many as a dozen teams to interview Israeli officers who fought against Hezbollah. The Army and Marine Corps have sponsored a series of multimillion-dollar war games to test how U.S. forces might fare against a similar foe. "I've organized five major games in the last two years, and all of them have focused on Hezbollah," said Frank Hoffman, a research fellow at the Marine Corps Warfighting Laboratory in Quantico.

A big reason that the 34-day war is drawing such fevered attention is that it highlights a rift among military leaders: Some want to change the U.S. military so that it is better prepared for wars like the ones it is fighting in Iraq and Afghanistan, while others worry that such a shift would leave the United States vulnerable to a more conventional foe.

"The Lebanon war has become a bellwether," said Stephen Biddle, a senior fellow at the Council on Foreign Relations who has advised Gen. David H. Petraeus, head of the U.S. Central Command. "If you are opposed to transforming the military to fight low-intensity wars, it is your bloody sheet. It's discussed in almost coded communication to indicate which side of the argument you are on."

U.S. military experts were stunned by the destruction that Hezbollah forces, using sophisticated antitank guided missiles, were able to wreak on Israeli armor columns. Unlike the guerrilla forces in Iraq and Afghanistan, who employed mostly hit-and-run tactics, the Hezbollah fighters held their ground against Israeli forces in battles that stretched as long as 12 hours. They were able to eavesdrop on Israeli communications and even struck an Israeli ship with a cruise missile.

"From 2000 to 2006 Hezbollah embraced a new doctrine, transforming itself from a predominantly guerrilla force into a quasi-conventional fighting force," a study by the Army's Combat Studies Institute concluded last year. Another Pentagon report warned that Hezbollah forces were "extremely well trained, especially in the uses of antitank weapons and rockets" and added: "They well understood the vulnerabilities of Israeli armor."

Many top Army officials refer to the short battle almost as a morality play that illustrates the price of focusing too much on counterinsurgency wars at the expense of conventional combat. These officers note that, before the Lebanon war, Israeli forces had been heavily involved in occupation duty in the Palestinian territories.

"The real takeaway is that you have to find the time to train for major combat operations, even if you are fighting counterinsurgency wars," said one senior military analyst who studied the Lebanon war for the Center for Army Lessons Learned at Fort Leavenworth, Kan. Currently, the deployments to Iraq and Afghanistan have prevented Army units from conducting such training.

Army generals have also latched on to the Lebanon war to build support for multibillion-dollar weapons programs that are largely irrelevant to low-intensity wars such as those fought in Iraq and Afghanistan. A 30-page internal Army briefing, prepared for the Joint Chiefs of Staff and senior Pentagon civilians, recently sought to highlight how the $159 billion Future Combat Systems, a network of ground vehicles and sensors, could have been used to dispatch Hezbollah's forces quickly and with few American casualties.

"Hezbollah relies on low visibility and prepared defenses," one slide in the briefing reads. "FCS counters with sensors and robotics to maneuver out of contact."

Defense Secretary Robert M. Gates is expected to stake out a firm position in this debate as soon as today, when he announces the 2010 defense budget. That document is expected to cut or sharply curtail weapons systems designed for conventional wars, and to bolster intelligence and surveillance programs designed to help track down shadowy insurgents.

"This budget moves the needle closer to irregular warfare and counterinsurgency," Pentagon spokesman Geoff Morrell said. "It is not an abandonment of the need to prepare for conventional conflicts. But even moving that needle is a revolutionary thing in this building."

The changes reflect the growing prominence of the military's counterinsurgency camp -- the most prominent member of which is Petraeus -- in the Pentagon. President Obama, whose strategy in Afghanistan is focused on protecting the local population and denying the Islamist radicals a safe haven, has largely backed this group.

The question facing defense leaders is whether they can afford to build a force that can prevail in a counterinsurgency fight, where the focus is on protecting the civilian population and building indigenous army and police forces, as well as a more conventional battle.

Gen. George W. Casey Jr., the Army's top officer in the Pentagon, has said it is essential that the military be able to do both simultaneously. New Army doctrine, meanwhile, calls for a "full spectrum" service that is as good at rebuilding countries as it is at destroying opposing armies.

But other experts remain skeptical. "The idea that you can do it all is just wrong," said Biddle of the Council on Foreign Relations. Soldiers, who are home for as little as 12 months between deployments, do not have enough time to prepare adequately for both types of wars, he said.

Biddle and other counterinsurgency advocates argue that the military should focus on winning the wars in Iraq and Afghanistan and only then worry about what the next war will look like.

Some in this camp say that the threat posed by Hezbollah is being inflated by officers who are determined to return the Army to a more familiar past, built around preparing for conventional warfare.

Another question is whether the U.S. military is taking the proper lessons from the Israel-Hezbollah war. Its studies have focused almost exclusively on the battle in southern Lebanon and ignored Hezbollah's ongoing role in Lebanese society as a political party and humanitarian aid group. After the battle, Hezbollah forces moved in quickly with aid and reconstruction assistance.

"Even if the Israelis had done better operationally, I don't think they would have been victorious in the long run," said Andrew Exum, a former Army officer who has studied the battle from southern Lebanon. "For the Israelis, the war lasted for 34 days. We tend to forget that for Hezbollah, it is infinite."

www.washingtonpost.com/wp-dyn/content/article/2009/04/05/AR2009040502235.html