Previously, during the presidency of Harry S. Truman and Dwight D. Eisenhower, the Chairman of the Joint Chiefs of Staff position was rotated in accordance with the incumbent chairman's armed force service branch in order to give the opportunity for every service branch to put their officer in Joint Chiefs of Staff Chairman position. However, in 1962, when President John F. Kennedy appointed General Maxwell Taylor to replace the incumbent Joint Chiefs of Staff chairman, General Lyman Lemnitzer who had been the Joint Chiefs of Staff Chairman since 1960, the traditional rotation for the chairman of the Joint Chiefs of Staff position between the Air Force, Navy, Marines, and Army (at that time the Space Force has not existed. and Commandant of The Coast Guard and Chief of the National Guard bureau are not yet part of the Joint Chiefs of Staff) was eventually broken by Kennedy due to General Taylor, who would succeed General Lemnitzer, are coming from same service branch, U.S. Army, and when General Earle Wheeler was appointed as Joint Chiefs of Staff chairman by President Lyndon Johnson in 1964, it resulted in Army generals holding the Chairman of The Joint Chiefs of Staff position for three consecutive terms, from 1960 to 1970. The similar incident in which Army generald served as Joint Chiefs of Staff chairman for three consecutive terms occurred again from 1989 to 2001, when President George H.W. Bush appointed Army general Colin Powell as Joint Chiefs of Staff chairman in 1989, and when Powell retired in 1993 he was replaced by another Army general, John Shalikashvili, who was appointed by President Bill Clinton, and when Shalikashvili retired in 1997 he was again replaced by an Army general, Hugh Shelton, until finally, when Shelton retired in 2001, he was replaced by non-army officer, Air Force general Richard B. Myers, who succeeded Shelton as Joint Chiefs of Staff chairman in October, 2001.