Victor Davis Hanson

President Obama has announced that America would stop attacking Col. Muammar Gadhafi's forces in Libya. He instead hopes that others can force out Gadhafi -- or that the dictator will leave through economic and diplomatic pressure.

It will apparently be up to NATO to finish the war -- without direct American combat participation. The relieved Obama administration had never quite explained what the mission was in the first place -- or for whom and for what we were fighting. Was the bombing to stop the killing, to help the rebels, to remove Gadhafi, or to aid the British and French, who both have considerable oil interests in Libya?

Were we enforcing just a no-fly zone, establishing a sort of no-fly zone with occasional attacks on ground targets, or secretly sending in American operatives on the ground to work with rebels? Did the Obama administration go well beyond the Arab League and United Nations resolutions by trying to target Gadhafi for a while and ensure that the rebels won? If so, did anyone care? Was the administration ever going to ask for congressional approval -- at a time when we are running a $1.6 trillion annual budget deficit and have about 150,000 troops committed in Afghanistan and Iraq? Was Libya a greater threat to our national security than Syria or Iran, or a greater humanitarian crisis than the Congo or Ivory Coast? Are our new allies, the rebels, Westernized reformers, Islamists, or both -- or neither?

The abrupt abandonment of hostilities after about two weeks has set an American military precedent. True, the United States once lost a big war in Vietnam. It also decided not to finish a war with Islamic terrorists in 1983 after Hezbollah operatives blew up 241 U.S. military personnel in their Beirut barracks. In 1993, a few months after the "Black Hawk Down" mess in Mogadishu, President Clinton quietly withdrew American troops from Somalia.

In the past, the United States has also agreed to conditions short of full victory, as with the 1953 armistice with the North Koreans that has left the Korean peninsula divided to this day. Bill Clinton also ordered missile attacks in retaliation for terrorist attacks on Americans -- both in Afghanistan and Sudan -- without much follow-up. Yet in no prior military engagement against a nation-state has the United States simply announced that it was arbitrarily and unilaterally going to stop fighting after an initial two weeks of combat operations.

I would not count on the ready departure of Gadhafi or his family.

Victor Davis Hanson

Victor Davis Hanson is a classicist and historian at the Hoover Institution, Stanford University, and a recipient of the 2007 National Humanities Medal.