March 24 : NATO begins hitting Yugoslav military targets with cruise missiles and bombs. Targets include missile batteries, radars and military communications sites. Russia suspends co-operation with NATO.
March 25 : Belgrade says 40 targets hit in first night's raids. Serbia orders journalists from NATO countries to leave.
Yugoslavia breaks off diplomatic relations with United States, France, Germany and Britain.
March 26 : NATO bombs Yugoslavia by day for the first time; strains show in NATO, with Italy urging that bombing be kept brief and Greece saying it should stop at once.
NATO shoots down two MiG fighter jets in north-east Bosnia.
March 27 : About 20,000 ethnic Albanian refugees pour into Albania.
US rejects pleas to send in ground troops; A US F-117 Stealth bomber crashes near Belgrade. The pilot is rescued.
March 28 :US President Bill Clinton says Serbs are committing "inhumane violence" in Kosovo. Britain says Serbs are "intent on genocide".
March 29 : NATO says its air power is racing to cripple Yugoslav forces before they clear Kosovo of ethnic Albanians.
US insists it has no plans to deploy ground troops.
March 30 : Yugoslav President Slobodan Milosevic holds talks with Russian Prime Minister Yevgeny Primakov, offers to withdraw some forces from Kosovo if NATO halts air strikes. The US, Britain and Germany reject the offer.
March 31 : Three US soldiers disappear after calling for help near Macedonia's border with Kosovo.
UN refugee agency UNHCR says 125,000 people have fled Kosovo since bombing began.
April 1 : Missing American soldiers shown on TV as battered prisoners. Yugoslavia says they were captured inside Kosovo. Kosovo Albanian leader Ibrahim Rugova shocks separatists by meeting Milosevic and, according to Yugoslav media, calling for a peaceful solution.
April 2 : Albania and Macedonia say they are overwhelmed by influx of Kosovo refugees.
Serbia's sister republic Montenegro calls for calm amid rumours of a Belgrade-backed coup.
April 3 : NATO missiles explode in heart of Belgrade, turning two interior ministry buildings into blazing infernos. Italy says big-power Contact Group to meet next week to discuss the conflict and meeting to be followed by session of Group of Eight industrial countries.
April 4 : NATO carries out a second day of missile strikes on Belgrade.
A Russian naval reconnaissance ship sails through Turkey's strategic Dardanelles strait, entering the Mediterranean on a mission intended to send a message of solidarity to Belgrade.
NATO says more than one million Kosovo Albanians have been uprooted from their homes and are trapped inside Kosovo, living in the woods and mountains with no food or shelter.
Pope John Paul opens an Easter Sunday Mass with an urgent appeal for peace in Kosovo and an end to the flood of refugees.