<P> One of Clark's most debated decisions during his SACEUR command was his attempted operation to attack Russian troops at Pristina International Airport, immediately after the end of the Kosovo War in June 1999 . A joint NATO--Russia peacekeeping operation was supposed to police Kosovo . Russia wanted their peacekeeping force to operate independently of NATO, but NATO refused . British forces were supposed to occupy Pristina International Airport, but a contingent of Russian troops arrived before they did and took control of the airport . Clark called then - Secretary General of NATO Javier Solana, who told him "you have transfer of authority" in the area . General Clark then issued an order for the NATO troops to attack and "overpower" the armed Russian troops . </P> <P> In response, Lieutenant General Mike Jackson refused to obey the order, reportedly telling him "I'm not going to start the Third World War for you". Jackson has said he refused to take action because he did not believe it was worth the risk of a military confrontation with the Russians, instead insisting that troops encircle the airfield . The stand - off lasted two weeks . Russian forces continued to occupy the airport, until eventually an agreement was secured for them to be integrated into peace - keeping duties, while remaining outside of Nato command . </P> <P> The refusal was criticized by some senior U.S. military personnel, with General Hugh Shelton calling Jackson's refusal "troubling". During hearings in the United States Senate, Senator John Warner suggested that the refusal might have been illegal, and that if it was legal, rules potentially should be changed . British Chief of the Defence Staff Charles Guthrie agreed with Jackson . </P> <P> Clark received another call from General Shelton in July 1999 in which he was told that Secretary Cohen wanted Clark to leave his command in April 2000, less than three years after he assumed the post . Clark was surprised by this, because he believed SACEURs were expected to serve at least three years . Clark was told that this was necessary because General Joseph Ralston was leaving his post as the Vice Chairman of the Joint Chiefs of Staff and would need another 4 - star command within 60 days or he would be forced to retire . Ralston was not going to be appointed Chairman of the Joint Chiefs of Staff due to an extramarital affair in his past, and the SACEUR position was said to be the last potential post for him . Clark said this explanation "didn't wash"; he believed the legal issues did not necessarily bar him from a full term . Clinton signed on to Ralston's reassignment, although David Halberstam wrote that the president and Madeleine Albright were angered at Clark's treatment . Clark spent the remainder of his time as SACEUR overseeing peacekeeper forces and, without a new command to take, was forced into retirement from the military on May 2, 2000 . </P>

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