This article by David Swanson on desertion in the US army is a must read. Excerpt:
As long as there has been a U.S. military, people have been leaving it. That choice has never been more appropriate than today. Individuals who signed up to defend the United States are engaged in a war that was sold on the basis of lies, was entirely unnecessary, is making us less safe, has nothing to do with defending anyone, and which involves the horror of slaughtering men, women, and children by the hundreds of thousands. The majority of Americans want the war to end and just voted accordingly in the Congressional elections. The majority of Iraqis want the war to end. The majority of American service men and women in Iraq want the war to end. And taking part in this war is illegal, whether you are ordered to do so or not.
Approximately 6,000 Americans have refused to report for duty or deserted in order to avoid taking part in this war, or to avoid taking further part in it. Many have objected to the stop loss program that requires them to serve longer than they had agreed to. Others have objected to the rationale behind the war and the horrors that are part of it.