[userulluipeste]

"Certainly they don't want to, but that's immaterial, they aren't allowed to. They are within the sphere of American order."

If we are referring to the Serbia-Romania example, the peace track record is way longer before what you call American order to be a thing (and even longer if we'd count peace between their people, before statehood), then afterwards it's safe to say that they kept their peace despite America's interests: https://en.wikipedia.org/wiki/NATO_bombing_of_Yugoslavia