The first NATO troops to enter Pristina on the 12th of June 1999 were Norwegian special forces from Forsvarets Spesialkommando (FSK) and soldiers from the British Special Air Service 22 S.A.S., although to NATO's diplomatic embarrassment Russian troops arrived first at the airport.
On 12 June, after Milošević accepted the conditions, the NATO-led peacekeeping Kosovo Force (KFOR) began entering Kosovo. KFOR had been preparing to conduct combat operations, but in the end, its mission was only peacekeeping. It was based upon the Allied Rapid Reaction Corps headquarters commanded by then Lieutenant General Mike Jackson of the British Army.