No, because there is no way to "finish" something like that. Understand that by "something like that" I mean a situation in which:

1) The enemy is fighting for a cause it believes in with complete and total determination;
2) The enemy has far more at stake in the war than we do, and is willing to take lopsided casualties as long as necessary to win; and
3) As a result, the only way to finally win the war is to literally exterminate the enemy -- genocide.

Look, the Vietnamese had been fighting for their independence for almost 100 years by the time they finally won it. In the American phase of the war, they took 10-1 casualties (or worse) year after year, battle after battle, as well as having their cities and civilian populations slaughtered from the air by carpet-bombing. And they showed every willingness to go on doing so. It was their country, and they wanted its independence from foreign rule. The U.S., on the other hand, had nothing at stake in Vietnam except a delusion, and because of this we were (quite rightly!) unwilling to take even the relatively light casualties were were taking for very long. And in fact, we would have had to go on taking them forever -- until we left.

The only way we could have "won" the war in Vietnam would have been to literally exterminate the Vietnamese, probably using nuclear weapons. Since we were unwilling to do anything that abominable, our defeat was guaranteed.

We face very much the same sort of situation in Iraq. Our military capability is far greater than that of the insurgents, but it was in Vietnam, too. We inflict lopsided casualties on the enemy, but we did in Vietnam, too. We win every engagement -- but we did in Vietnam, too. And the enemy just keeps coming and keeps coming and will keep coming forever, until we leave. Just as it did in Vietnam.

There is no victory against an enemy that determined. All you can do is delay defeat. Now -- if we were defending our own homeland, it would be different. Then, our determination would probably exceed the enemy's. But when there isn't any good reason for us to be there in the first place, we lack the will, we're unable to go on taking casualties forever, and rightly so.

Some jobs cannot be finished, and the only way to avoid catastrophy is not to start them.