Pressure is building on President Obama to involve the United States more deeply in the brutal civil war in Syria that may have claimed as many as 70,000 lives, and created more than a million refugees. Late last week, the editorial board of the Washington Post called for “aggressive intervention by the United States and its allies to protect the opposition and civilians.” 

Sen. Lindsey Graham (R‑SC) apparently believes that the Post didn’t go far enough because the editorial explicitly ruled out sending U.S. ground troops. He wants the U.S. military to secure suspected chemical weapons caches there. But where Graham is leading few will follow, aside from his frequent co-conspirator, Sen. John McCain (R‑AZ). The American people are not anxious to send U.S. troops into the middle of yet another civil war in the region.

Some do want the U.S. government to do more, however, and not just the people who sold us the war in Iraq. For example, during a stop in Saudi Arabia earlier this month, Secretary of State John Kerry made vague references to increasing the flow of arms to the Syrian opposition. Back here in Washington, Senate Armed Services Committee Chairman Sen. Carl Levin (D‑MI) became the latest to call for establishing a no-fly zone over Syria. Arms supplied to resistance fighters can be directed against other targets when the regime collapses (or may simply prolong the war if it doesn’t), which is why no-fly zones are seen as the less risky option. They could satisfy the understandable human instinct to be seen as doing something, anything, in the face of enormous human suffering. As such, if President Obama were to institute a no-fly zone, it might forestall an even more costly and risky operation, one that did involve U.S. troops on the ground. 

But no-fly zones often become precursors to additional involvement at a later date. If the no-fly zone fails to swiftly halt the violence, some will claim that preserving U.S. credibility requires an even deeper commitment. Or they can just become a slippery slope in their own right. The ink was barely dry on the UN Security Council resolution authorizing a no-fly zone over Libya before the mission morphed into a no-drive zone on the ground, and then a major military operation to overthrow Qaddafi’s government. 

As a general rule, we shouldn’t send our military on feel-good missions that have little chance of success. And that is what no-fly zones are. They also have a clear political purpose, in this case to ensure that the opposition prevails over the Assad regime and its supporters. There is no such thing as an impartial intervention. We are choosing sides, and arguably already have, without a clear sense that the regime that comes after will be an improvement over what came before. We are placing ourselves into the middle of a much wider sectarian dispute taking place throughout the region. 

Claims that the United States has a unique opportunity to shape the political process in Syria are equally misguided. Though we wish otherwise, a U.S. government stamp of approval is likely to undermine the legitimacy of genuine democrats in Syria, to the extent that there are any. And we know that the opposite is true: individuals or groups singled out for criticism, for example the al-Nasra Front, have seen their stature rise. The reason is simple: the American brand has never been lower in the region, and is held in particularly low regard in Syria. 

When I wrote about Syria late last year (here and here), I was reasonably confident that President Obama would not intervene, in spite of the fact that his decision to help the Libyan rebels overthrow Muammar Qaddafi established a precedent for a similar regime-change operation in Syria. The key distinctions between the two cases include UN Security Council support for intervention in Libya, but not in Syria, a relatively well-defined mission in Libya, but not in Syria, and a reasonable expectation that the costs of military operations could be kept limited, and would deliver clear results, which was true in Libya, but is not true in Syria. Earlier this week, Joint Chiefs of Staff chairman Gen. Martin Dempsey threw cold water on the notion that the military could produce an acceptable outcome in Syria. 

The general’s candor is both welcome and refreshing. Although the suffering in Syria is gut-wrenching, the U.S. military lacks the ability to resolve the underlying social and political disputes that are driving the civil war. Indeed, as Ben Friedman pointed out last year, outside intervention might actually prolong such conflicts, or initiate new ones, resulting in even greater loss of life. 

The American people have so far proved unwilling to intervene in Syria, and are particularly resistant to the idea of U.S. troops marching on Damascus. They were similarly disinclined to become involved in Libya, however, and the president ignored the public in that previous case. He should not do so with respect to Syria. And Congress shouldn’t allow it if he tries.