Until maybe 10 or more years ago, having come of age in the 1960s, I avoided Vietnam War subjects like the plague. Decided at some point that I wanted to know more than what little I did. What an ugly picture.
One book in particular got under my skin. "JFK and Vietnam: Deception, Intrigue, and the Struggle for Power" by John M. Newman.
Major Newman, USA ret., later Ph.D. Newman was a staff member working for the Joint Chiefs when choosing this topic for his dissertation. I believe he was the first author to get a most reluctant McNamara to agree to extensive interviews about the war.
Newman interviewed other key Kennedy administration officials and reviewed key documents, such as National Security Agency Memoranda. Eventually, McNamara gave the author complete access to his protected government archives.
McNamara said he and Kennedy had a "concrete" understanding (meaning the policy would not change) that U.S. combat troops would never be sent to Southeast Asia. Despite the intent of the Pentagon and the MACV command and PACCOM to deceive JFK with positive statistics in order to lock him into a growing militarization, the president held firm until his death.
Diem's fall and assassination was confirmation of his thinking. (Also, JFK was aghast at the Buddhist immolations that began in June 1963, iirc, a further powerful sign of SVN government corruption and isolation.)
So, Dallas ended the lives of nearly
58,000 American men (LBJ not only reversed JFK's Vietnam policy within days of November 22 but in March 1965 inserted the first U.S. combatants into South Vietnam when Marines came ashore at DaNang).
Cronkite interview with JFK early September 1963:
VIetnam Q/A begins at 12:37 mark
Amazon product
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John M. Newman is an American author and retired major in the United States Army. Newman was on the faculty at the University of Maryland from 1995 to 2012, and has been a Political Science professor at James Madison University in Harrisonburg, Virginia since January 2013.