I can't believe what you said went unchallenged. It's reality defying....
Have a read at the wiki page for the
NATO intervention in Bosnia and Herzegovina. NATO got involved militarily in 1994 with the
Operation Deny Flight which closed the airspace over Bosnia and that involved shooting down 4 Serbian jets. It was followed with
Operation Deliberate Force which was a sustained bombing campaign against Bosnian Serb targets. It involved 400 planes, dropping around 1000 bombs including (controversially) ~20 depleted uranium bombs.
Those events preceded the Dayton Peace Agreement.