Don’t confuse having some advisers there with creating JFK’s Vietnam War.
The US Army had been involved in Vietnam since FDR and the 1940s with no intention of becoming engaged in an American war there, we have advisers and Army Special Forces all over the globe and in war zones today, that has nothing to do with sending in 16,000 troops as JFK did, and Nixon would not have done.
JFK did not want to expand the war in Vietnam and had drafted plans to pull US forces out of Vietnam. LBJ owned his political career to Brown and Root (a subsidiary to Halliburton), the huge defense contractors that wanted war in Vietnam. LBJ gave Brown and Root the contruction contracts in South Vietnam. Hell, he and his wife has so much stock in Brown and Root, it was called Brown, Root and Johnson. LBJ also had huge stock in Flying Tiger Airlines, who flew most of the US military to Southeast Asia. Well Kennedy wanted to end the American involvement in SEA, Johnson wanted to make money. Does not take a genius to put two and two together. On his death bed, Douglas MacArthur pleaded with JFK to keep the US out of Vietnam, saying it was an unwinnable civil war. What man alive knew more about war in the Pacific theater and Asian geopolitical politics than MacArthur. I can’t think of any. Looks like JFK was going to take his advice. Then he went to Dallas and we all know the rest the story. Vietnam was not Eisenhower’s war, it was not JFK’s war, it was not Nixon’s war, it was that sorry ass, crooked as a snake Lyndon Johnson’s war. End of story.