The term Kosovo War or Kosovo Conflict is often used to describe two sequential and at times parallel armed conflicts in Kosovo:

1. 1996–1999: Conflict between Serbian and Yugoslav security forces and the Kosovo Liberation Army (KLA), an ethnic Albanian guerilla group seeking secession from the former Yugoslavia.
2. 1999: War between Yugoslavia and the North Atlantic Treaty Organization between March 24 and June 10 1999, during which NATO attacked Yugoslav targets, Albanian guerrillas continued battles with Yugoslav forces, amidst a massive displacement of population in Kosovo.