USAFE forces again mobilized in March 1999, when NATO intervened in Kosovo to halt a Yugoslav counter-insurgency targeting the Kosovo Liberation Army. USAFE forces provided air-support for Albanian fighters on the ground. Albanian refugees appeared after the beginning of hostilities. Efforts to find a diplomatic solution collapsed, resulting in Operation Allied Force–the NATO-led air war over Kosovo. The 78-day operation ended 20 June culminating in the withdrawal of Serb forces from Kosovo and the eventual return of refugees. USAFE's 3rd Air Force led Joint Task Force Shining Hope, established to assist the hundreds of thousands of refugees who left Kosovo because of war. USAFE continues to contribute to NATO-led forces promoting peace and stability in Kosovo.