Warfare has changed since World War II. Unless we want World War II-level casualties we will want to rely on trained troops to fight our years. It takes years to produce trained infantry and at least a decade to train officers and cadre. Most important, there is no political support to reinstitute conscription. The War on Terrorism will be won by communicating an attractive vision for Muslims, not by employing Christian and Jeewish Americans to invade Muslim countries. Clearly, we are in a very early stage of this war, with the Iraq campaign as a serious misstep for Republicans.
I didn't make myself clear. I did not intend for any reinstatement of conscription, quite to the contrary. The military doesn't want, or need, conscripts. However, we do need to make the absolute BEST use of the soldiers we have.