Tuesday, March 1, 2011

Never Fight a Land War in Asia

U.S. Secretary of Defense Robert Gates, speaking at West Point, said last week that “Any future defense secretary who advises the president to again send a big American land army into Asia or into the Middle East or Africa should have his head examined.” In saying this, Gates was repeating a dictum laid down by Douglas MacArthur after the Korean War, who urged the United States to avoid land wars in Asia. Given that the United States has fought four major land wars in Asia since World War II — Korea, Vietnam, Afghanistan and Iraq — none of which had ideal outcomes, it is useful to ask three questions: First, why is fighting a land war in Asia a bad idea? Second, why does the United States seem compelled to fight these wars? And third, what is the alternative that protects U.S. interests in Asia without large-scale military land wars?

Wars need to be fought with ends that can be achieved by the forces available. Donald Rumsfeld once said, “You go to war with the Army you have. They’re not the Army you might want or wish to have at a later time.” I think that is a fundamental misunderstanding of war. You do not engage in war if the army you have is insufficient. When you understand the foundations of American military capability and its limits in Eurasia, Gates’ view on war in the Eastern Hemisphere is far more sound than Rumsfeld’s.

Diplomacy for the United States is about maintaining the balance of power and using and diverting conflict to manage the international system. Force is the last resort, and when it is used, it must be devastating. The argument I have made, and which I think Gates is asserting, is that at a distance, the United States cannot be devastating in wars dependent on land power. That is the weakest aspect of American international power and the one the United States has resorted to all too often since World War II, with unacceptable results. Using U.S. land power as part of a combined arms strategy is occasionally effective in defeating conventional forces, as it was with North Korea (and not China) but is inadequate to the demands of occupation warfare. It makes too few troops available for success, and it does not know how many troops might be needed.

This is not a policy failure of any particular U.S. president. George W. Bush and Barack Obama have encountered precisely the same problem, which is that the forces that have existed in Eurasia, from the Chinese People’s Liberation Army in Korea to the Taliban in Afghanistan, have either been too numerous or too agile (or both) for U.S. ground forces to deal with. In any war, the primary goal is not to be defeated. An elective war in which the criteria for success are unclear and for which the amount of land force is insufficient must be avoided. That is Gates’ message. It is the same one MacArthur delivered, and the one Dwight Eisenhower exercised when he refused to intervene in Vietnam on France’s behalf. As with the Monroe Doctrine, it should be elevated to a principle of U.S. foreign policy, not because it is a moral principle but because it is a very practical one.