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American Commander of US Armed Forces in South Vietnam General William C Westmoreland (1914 - 2005) as he sits behind his desk, Vietnam, 1966. (Photo by PhotoQuest/Getty Images)

American Commander of US Armed Forces in South Vietnam General William C Westmoreland (1914 - 2005) as he sits behind his desk, Vietnam, 1966. (Photo by PhotoQuest/Getty Images)

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General William Westmoreland, the new US Army Chief of Staff, pictured during service in Vietnam, March 23rd 1968. (Photo by Keystone/Hulton Archive/Getty Images)

General William Westmoreland, the new US Army Chief of Staff, pictured during service in Vietnam, March 23rd 1968. (Photo by Keystone/Hulton Archive/Getty Images)

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6th April 1968: President Lyndon Johnson (1908-1973) (standing) confers with General William Westmoreland (1914 - 2005) during a breakfast meeting at the White House, Washington, DC. (Photo by Agence France Presse/Agence France Presse/Getty Images)

6th April 1968:  President Lyndon Johnson (1908-1973) (standing) confers with General William Westmoreland (1914 - 2005) during a breakfast meeting at the White House, Washington, DC.  (Photo by Agence France Presse/Agence France Presse/Getty Images)

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American General William C. Westmoreland (1914 - 2005) in his military uniform, 1970s. (Photo by Archive Photos/Getty Images)

American General William C. Westmoreland (1914 - 2005) in his military uniform, 1970s. (Photo by Archive Photos/Getty Images)

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APR 18 1972, APR 19 1972, JAN 14 1974; GEN. WILLIAM C. WESTMORELAND GIVES HIS VIEWS; While he spoke, antiwar protesters marched outside.; (Photo By John Beard/The Denver Post via Getty Images)

APR 18 1972, APR 19 1972, JAN 14 1974; GEN. WILLIAM C. WESTMORELAND GIVES HIS VIEWS; While he spoke, antiwar protesters marched outside.;  (Photo By John Beard/The Denver Post via Getty Images)