serbia and montenegro ) , which controlled Control kosovo before the war Hostile_encounter , and the kosovo albanian rebel group known as the kosovo liberation army ( kla ) , with air support Supporting from the north atlantic treaty organisation ( nato ) from 24 march 1999 , and ground support Supporting from the albanian army .

the christmas uprising Change_of_leadership or christmas rebellion Change_of_leadership ( serbian : unk unk , `` unk unk '' or unk unk , `` unk unk '' ) refers to an uprising Change_of_leadership led by the unk , in response Response to the podgorica assembly Come_together 's claim Statement of authority to unite Cause_to_amalgamate the kingdom of montenegro with the kingdom of serbs , croats , and slovenes .