"War in Europe" draws on hundreds of hours of news footage, home videos filmed by the Kosovo Liberation Army, Kosovar refugees, and gun camera footage in NATO archives, to chronicle NATO's first war in its 50-year history.

In Part One,"The Road to War," FRONTLINE sketches the roots of the conflict: the Kosovar Albanians' fight for independence from Serb oppression, why Milosevic and Serbia could never give up Kosovo, and how, despite intense diplomatic efforts by the West, violence between the Kosovo Liberation Army and Milosevic's brutal retaliation escalated throughout 1998.

This first chapter relates how Washington and NATO at first were not prepared to fight the war. Secretary of State Madeleine Albright, a champion of using force for moral reasons, tried to push President Clinton toward military intervention in Kosovo. When Clinton finally agreed, he publicly ruled out ground troops. The Clinton team calculated that the threat of bombs alone would force Milosevic to withdraw from Kosovo.

But NATO lost its gamble. Serbia's leader stood firm and Serb troops accelerated their ethnic cleansing on the ground.

In Part Two, "The Real War," FRONTLINE chronicles how NATO's war--launched March 24,1999--came by increments and was fought by committee. Interviews with U.S. Defense Secretary William Cohen and other policymakers reveal how the war's strategy and tactics were hamstrung by political considerations in Washington and among the other 18 NATO nations.

"No set of targets was more important than maintaining the consensus of NATO." says General Wesley Clark, NATO Supreme Allied Commander. Clark, along with General Charles Krulak and General Klaus Naumann, offer behind-the-scenes accounts of the war and its political constraints. NATO pilots could fight only in Kosovo and couldn't strike at strategic targets in Serbia. Without ground troops, it was a mission that would prove almost impossible.

As evidence mounted that the air war was failing to protect Kosovar Albanians on the ground and that NATO possibly was losing the war, British Prime Minister Tony Blair pushed for planning a ground force invasion. Around the same time, NATO's bombers began pounding targets in downtown Belgrade--something Lt. Gen Michael Short,head of NATO's air campaign, had argued for from the start. Finally, with the intervention of Russia, a deal was struck with Milosevic and 78 days after it started, the air war against Milosevic ended.

However, with hostilities remaining between the two warring sides, and with the prospect that NATO troops will be in Kosovo for a long time to come, no one today is claiming a great victory in this latest Balkan conflict.