In 1998, tensions between the Albanian and Serb population of Kosovo simmered and erupted into major violence and discrimination culminating into the humanitarian tragedy of the Kosovo War. The conflict led to the displacement of hundred thousands of Albanians to the neighboring countries and Europe. Serbian paramilitary forces committed war crimes in Kosovo, although the government of Serbia claims that the army was only going after suspected Albanian terrorists. The NATO launched a 78-day air campaign in 1999 to halt the humanitarian catastrophe that was then unfolding in Kosovo and finally concluded the ended the war.