What was the last war/conflict that the U.S. military played a major role in that you consider to be an overall victory?

Bosnia and Herzegovina if you count our jobs as peacekeepers over there. Very few US units, aside from the Air Force, really saw much action over there.
The First Gulf War on the other hand was a major combat operation that saw major combat for all branches and was an enormous victory for the US. We defeated what was at the time the world's fourth largest military in about a month and a half of total combat, and only 100 hours of ground combat.

Bosnia and Herzegovina , we don't hear much about that place anymore, seems to be quiet over there now.

SSG Johnston I'm not disagreeing but aren't those regions still pretty unstable? I was still just a kid back then so I really don't know what happened but as far as I know everywhere you mentioned is currently in a state of unrest to say the least. It seems to me that if the reason you send your military into an area is to bring peace and stability then the mission isn't complete until long peace is achieved and the area is stable without fear of another conflict in the near (20 to 30 year) future. I believe that the first time it was suggested that troops try to "Win hearts and minds" that our military lost a massive amount of power. When started caring more about the feelings of the locals than getting the job done we started losing.