The 1995 NATO bombing in Bosnia and Herzegovina (code-named by NATO Operation Deliberate Force) was a sustained air campaign conducted by the North-Atlantic military organization to undermine the military capability of the Bosnian Serb Army who threatened and attacked UN-designated "safe areas" in Bosnia. The operation was carried out between 30 August and 20 September 1995, involving 400 aircraft and 5000 personnel from 15 nations.