What did the intervention achieve?

A cessation of the slaughter of Kosovar Albanians?

I opposed the intervention as being in the category of "not our business" and faulted the decision to rely mostly on air strikes rather than ground combat as the means of carrying out the mission once launched. Even I concede that it likely did more good than harm, though.

Finally the "US had to save Europe from itself" (Twice) meme might be offset with "the US push into the Balkans started the next European war"

Remember, though, that the U.S. had to be dragged kicking and screaming into the mess. We stayed out of Bosnia under George H.W. Bush and well into the Clinton administration and Tony Blair essentially shamed Clinton into intervening in Kosovo the first time.