He created special warfare units...or at least gave them priority in future military involvement; the Green Beret and the SEALs.
It didn't..
Primarily as nurses.
Many people still don't know because he was assassinated but many assume he would have expanded the war effort.
JFK
JFK
around 1961
The Vietnam War.
We made DDT for the War Effort.
Hawks.
When JFK was in office Vietnam was not the problem it became. Eisenhower began it when he told Vietnam the United States would help when the French left, and then JFK was elected it wasn't an issue with the American public. JFK sent advisers into Vietnam to help and train forces to fight the communist. So, there wasn't a big announcement or much said about sending advisors into the country. Things were just starting to escalate when JFK was killed and that left Vietnam to LBJ to do something. It was LBJ who really sent troops and escalated the "police action " into a war and by 1968 the largest draft in US history. Nixon expanded the war into Laos and did secret bombardment. All of this was done on the foreign policy to contain communist aggression and to save the world for democracy. As it went on the newspapers carried more stories and every night on TV there was reports on site from Vietnam. It was the TV news showing the war that convinced the public the war was wrong. Notice we get very little about the Middle East nor about our men who have died there. That is not an accident.
Both are to blame , but the major blame is on John Kennedy.
JFK (same year as Diem/1963).