Insurgency in south Serbia and Macedonia After the end of the Kosovo War in 1999 with the signing of the Kumanovo agreement, a 5-kilometre-wide Ground Safety Zone (GSZ) was created. It served as a buffer zone between the Yugoslav Army and the Kosovo Force (KFOR). In June 1999, a new Albanian militant insurgent group was formed under the Liberation Army of Preševo, Medveđa and Bujanovac (UÇPMB), which started training in the GSZ. The group began attacking Serbian civilians and police, which escalated into an insurgency.
insurgency in south serbia and macedonia after the end of the kosovo war in 1999 with the signing of the kumanovo agreement a 5-kilometre-wide ground safety zone (gsz) was created it served as a buffer zone between the yugoslav army and the kosovo force (kfor) in june 1999 a new albanian militant insurgent group was formed under the liberation army of preševo medveđa and bujanovac (uçpmb) which started training in the gsz the group began attacking serbian civilians and police which escalated into an insurgency