Insurgency in the Preševo Valley

The insurgency in the Preševo Valley was an approximately two year-long armed conflict between 12 June 1999 until 1 June 2001, between the Federal Republic of Yugoslavia and the ethnic Albanian separatists of the Liberation Army of Preševo, Medveđa and Bujanovac (UÇPMB). There were instances during the conflict in which the Yugoslav government requested KFOR support in suppressing UÇPMB attacks since they could only use lightly armed military forces as part of the Kumanovo Treaty that ended the Kosovo War, which created a buffer zone between FR Yugoslavia and Kosovo.

Source: Wikipedia — Insurgency in the Preševo Valley (CC BY-SA 4.0)