The Banja Luka incident, on 28 February 1994, was an incident in which six Republika Srpska Air Force J-21 Jastreb single-seat light attack jets were engaged, and four of them shot down, by NATO warplanes from the United States Air Force. U.S. F-16 fighters southwest of Banja Luka, Bosnia and Herzegovina successfully engaged and destroyed several Bosnian Serb warplanes which had attacked a Bosnian factory, while suffering no casualties of their own. It marked the first active combat action, air-to-air or otherwise, in NATO's history.