NATO’s Kosovo Force and Western Balkans Stability
NATO still leads Kosovo Force under a 1999 U.N. mandate, with about 4,700 troops from 31 countries and a U.S. presence that supports the mission.
PRISTINA, Nov. 6, 2026 — NATO has led the Kosovo Force, or KFOR, since June 1999, and the alliance’s public brief, updated on Oct. 15, describes a mission of about 4,700 troops from 31 Allied and partner countries. The mandate comes from United Nations Security Council Resolution 1244, adopted on June 10, 1999, and from a Military-Technical Agreement with the governments of the Federal Republic of Yugoslavia and Serbia. NATO says KFOR operates under Chapter VII of the U.N. Charter and is, in legal terms, a peace-enforcement operation.
Today the stated tasks are narrower than they were at entry. NATO says KFOR works to maintain a safe and secure environment for all communities in Kosovo and freedom of movement, in coordination with the Kosovo Police and the European Union Rule of Law Mission (EULEX). Maj. Gen. Roberto Vergori of Italy assumed command on Oct. 14, 2026, succeeding Maj. Gen. Ozkan Ulutas of Turkey.
How the force is built, and why it still matters
KFOR first entered Kosovo on June 12, 1999, after a 78-day air campaign. NATO says the original force numbered some 50,000 personnel. Troop levels later fell as the security situation improved, reaching the so-called Gate 2 posture of about 5,000 troops in 2011. Headquarters remain at Camp Film City in Pristina, with Regional Command East at Camp Bondsteel near Ferizaj/Urosevac and Regional Command West at Camp Villaggio Italia in Pec/Peje.
Violence in 2023 produced the largest reinforcement in a decade, NATO says, with up to 1,000 extra troops and a presence that rose well above 4,500. On June 12, 2026, after describing an improved security situation, NATO announced a gradual, conditions-based “optimisation” of that posture over the following year, a process it says can be reversed if security conditions change. On Aug. 10, KFOR began integrating Kosovo Police personnel into the security arrangement at Visoki Decani Monastery, the last designated site still under fixed KFOR protection. NATO says KFOR remains the first responder there.
The U.S. State Department, in a 2026 report to Congress required by the fiscal 2026 national-security appropriations act, treats the Western Balkans as six partners: Albania, Bosnia and Herzegovina, Kosovo, Montenegro, North Macedonia and Serbia. The report says U.S. policy has shifted away from “nation-building” toward stability and commercial partnerships, and that “malign actors can exploit regional instability to the detriment of U.S. interests.”
The Congressional Research Service’s overseas-basing study records that the United States has kept forces in Kosovo since 1999 specifically to support KFOR. That presence is one reason the mission remains a U.S. as well as a European concern, even as NATO describes the current troop figure as a deterrent posture rather than the large entry force of 1999. NATO also says it continues to support the European Union-facilitated dialogue between Belgrade and Pristina as the path for unresolved political issues. Coverage of the region continues on the Balkans hub and the NATO page. See also the 2026 Serbia election and EU accession roadmaps that place Montenegro first.
Sources
- NATO: NATO’s role in Kosovo (updated Oct. 15, 2026)
- U.S. State Department: United States Policy to Promote Regional Stability (2026 report to Congress)
- Congressional Research Service: U.S. Overseas Basing (R48123)
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