"On June 23, 1964, President Johnson announced the appointment of Gen. Maxwell Taylor as U.S. ambassador to Viet Nam. General Taylor was a former Chairman of the U.S. Joint Chiefs of Staff and military advisor to President Kennedy. General Taylor's appointment underscored the importance of the U.S. government attached to the military situation in South Viet Nam. This also meant that the U.S. would apply a new strategy in the fight against the Viet Cong. General Taylor, in fact, wrote a book, The Uncertain Trumpet, in which he developed what was called the strategy of "Graduated Response." This strategy would allow the U.S. to respond in kind to Communist aggression without resorting to nuclear warfare. The flexibility of this strategy would provide the U.S. with the option at any time to "proceed or not, to escalate or not, and to quicken the pace or not." General Taylor also saw Viet Nam as a welcome opportunity to test his concept of limited war. This concept was adopted by President Kennedy. Based on this concept, President Kennedy created the famous Special Forces for the specific purpose of helping Third World countries fight against what was called brush fire or unconventional warfare against Communist insurgencies."