Clifford was appointed by U.S. President [[Lyndon Johnson]] Secretary of Defense at the height of Johnson's escalation of the [[Vietnam conflict]] upon termination of Secretary [[Robert McNamara]]. Clifford recites in a PBS documentary on the Vietnam War that he had "turned against the war" shortly after Johnson appointed him Defense Secretary.<ref>[https://www.pbs.org/wgbh/amex/vietnam/series/pt_06.html ''Vietnam: A Television History''], (1983). Transcript retrieved from PBS.org 13 July 2007.</ref>
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Clifford was appointed by U.S. President [[Lyndon Johnson]] [[Secretary of Defense]] at the height of Johnson's [[escalation]] of the [[Vietnam war]] upon termination of Secretary [[Robert McNamara]]. Clifford recites in a [[PBS]] documentary on the Vietnam War that he had "turned against the [[war]]" shortly after Johnson appointed him Defense Secretary.<ref>[https://www.pbs.org/wgbh/amex/vietnam/series/pt_06.html ''Vietnam: A Television History''], (1983). Transcript retrieved from PBS.org 13 July 2007.</ref>