The U.S. had no obligation under NATO treaties to engage in any action in Kosovo. In this respect, the U.S. in Kosovo was remarkably similar to the U.S. in the Persian Gulf War. The U.S. government put pressure on these organizations to draft resolutions requiring some kind of armed response to a problem, then used those very same resolutions to justify the armed response. It was all a lot of crap from Day 1.
The U.S. even used NATO as their "instrument" in Kosovo because they knew the United Nations would never get on board like it did in the Persian Gulf. If NATO didn't exist, I'm sure Clinton would have dusted off an old piece of legislation from World War II, scribbled out Adolph Hitler's name and replaced it with Slobodan Milosevic, and used that to justify his half-assed war.
This country is truly the light of the world and the beacon of hope for mankind. No wonder we're hated by our enemies. It is exactly what America embodies that has made people from all over the world come to our shores. And armed with justice in the confidence of our greatness we will win.