The largest event of Clark's tenure as SACEUR was NATO's confrontation with the Federal Republic of Yugoslavia in the Kosovo War. On September 22, 1998, the United Nations Security Council introduced Resolution 1199 calling for an end to hostilities in Kosovo, and Richard Holbrooke again tried to negotiate a peace. This process came to an unsuccessful end, however, following the Račak massacre. Then U.S. Secretary of State Madeleine Albright tried to force Yugoslavia into allowing separation of Kosovo with the Rambouillet Agreement, which Yugoslavia refused. Clark was not at the Rambouillet talks. He separately tried to convince Yugoslavian president Slobodan Milošević by telling him "there's an activation order. And if they tell me to bomb you, I'm going to bomb you good." Clark later alleged that Milošević launched into an emotional tirade against Albanians and said that they'd been "handled" in the 1940s by ethnic cleansing.