Yes; the movie implies that in the closing screen notes.
We never fought to win the war - only a hill, a valley, a trail. I finally got to the point that I couldn't stand the losses any longer - with nothing accomplished. General Westmoreland: We can see the light at the end of the tunnel. Retired after the failed 'war' with a Veteran's 100% disability. Humbug!
Thank you for your service.
>>We never fought to win the war - only a hill, a valley, a trail<<
only to give ‘em up later...see the fight for Khe Sahn(twice) only to give it up a few months after the last Tet siege in 68. IMO...Westmoreland got a lot of Marines killed to prove a point.