NATO'S ROLE

North Atlantic Treaty Organization intervention inBosnia-Herzegovina began April 12, 1993, with deployment of airpatrols to enforce a no-fly zone over the former Yugoslav republic.NATO involvement this year includes: Feb. 9: NATO gives Bosnian Serbs 10 days to withdraw heavy weaponsfrom within a 12 1/2-mile exclusion zone around Sarajevo or face airstrikes. NATO authorizes immediate air strikes if attacks oncivilians continue. Feb. 11: Serb and Muslim-led Bosnian government forces begin toplace heavy arms under UN control. Feb. 21: NATO suspends the threat of immediate air strikes. Feb. 28: The first NATO air strike for violation of the no-fly zone.Four Serb planes are downed by two U.S. F-16 jets near the centralBosnian town of Novi Travnik. April 10: Two U.S. F-16s bomb Bosnian Serb positions around theeastern Bosnian Muslim enclave of Gorazde, under Serb attacks sinceMarch 29 and one of six UN-declared safe areas in Bosnia. April 11: A second NATO bombardment of Serb targets as part of amission to provide close air support for UN personnel in Gorazde. April 16: A British Sea Harrier fighter plane serving with NATO isdowned over Gorazde. The UN warns Serb forces of air strikes if theycontinue advancing on the town. April 20: NATO agrees in principle to UN calls for air strikes todefend Bosnian civilians against Serb attack. April 22: NATO issues an ultimatum demanding the withdrawal of Serbforces shelling Gorazde from within a 2-mile exclusion zone aroundthe town by April 24. The alliance also orders the Serbs to withdrawtheir heavy weapons from within a 12 1/2-mile exclusion zone byApril 27. The Serbs comply partially, but to NATO satisfaction.