Bourne Ultimatum

I know that we have already talked about war, and if there is a way to actually win a war, but last night I was watching Bourne Ultimatum (here is a link to a summary for those who have not seen the movie http://www.imdb.com/title/tt0440963/synopsis)  and it got me thinking on the topic again. At one point in the movie a head of a CIA search team, whose job it is to hunt Jason Bourne, orders someone to kill two CIA agents: one for leaking information on a dirty operation, and the other for presumably helping Bourne. Another agent protests and says "You start down this path (killing two of your own agents), where does it end?" to which the head agent responds "It ends when we've won." Just be be clear in the movie Jason Bourne and the CIA are at "war." The quote brings up the question of how does one win a war? People are killed on both sides, and in the end nothing is really gained. I have to say when this part came on I became really excited since it connected to A Farewell to Arms.  I hope I did not ramble on and I hope this makes sense to everyone.