The Kosovo Force (KFOR) is a NATO-led international force responsible for establishing and maintaining security in Kosovo. This peace-enforcement force entered Kosovo on 12 June 1999 under a United Nations mandate, two days after the adoption of UN Security Council Resolution 1244.
There's KFOR (Kosovo Force), SFOR (Servia Force) and a whole bunch of other FORs named after their area of action. So you can conclude from where they are what their name means, usually. A lot more difficult: the names of UN's many aid organizations. (UNHCR etc)