Key Facts
- Duration
- 78 days (24 March – 10 June 1999)
- NATO civilian casualties inflicted
- 489–528 civilians killed
- Yugoslav security forces killed by NATO
- ~1,000
- Depleted uranium dropped
- 9–11 tonnes across Yugoslavia
- Kosovar Albanians expelled
- ~848,000
- Civilians killed or missing (all causes)
- 10,317
Strategic Narrative Overview
NATO's aerial bombing campaign, codenamed Operation Allied Force, began on 24 March 1999 and targeted Yugoslav military installations, infrastructure, bridges, industrial plants, hospitals, and schools across the Federal Republic of Yugoslavia. The alliance dropped between nine and eleven tonnes of depleted uranium munitions. Yugoslav forces continued operations in Kosovo during the bombing, killing between 1,500 and 2,131 combatants and causing tens of thousands of further civilian displacements before negotiations gained traction.
01 / The Origins
Yugoslavia's systematic ethnic cleansing of Kosovar Albanians during the Kosovo War drove hundreds of thousands of refugees into neighbouring countries, threatening regional stability. International organisations condemned Belgrade's actions. After Yugoslavia rejected the Rambouillet peace proposal, NATO framed military action as a humanitarian intervention. Unable to obtain UN Security Council authorisation due to Russian and Chinese vetoes, NATO launched the campaign without explicit UN approval, raising profound questions about the legality of the operation under international law.
03 / The Outcome
The campaign ended on 10 June 1999 after Yugoslavia agreed to withdraw its army from Kosovo. The UN established the United Nations Interim Administration Mission in Kosovo (UNMIK) to administer the territory. In the days following the Yugoslav withdrawal, over 164,000 Serbs and 24,000 Roma fled Kosovo. Remaining non-Albanian civilians faced abuses including beatings and murders. Serbia subsequently became home to the largest refugee and internally displaced population in Europe.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Side B
1 belligerent