How did u. s. involvement in vietnam change during the kennedy and johnson administrations?

Financial and military aid to troops on the ground: JFK supported the South Vietnamese with money and advisers. LBJ put soldiers on the front and began the draft increasing the US presence. 

The Gulf of Tonkin incident, an attack on a US ship off the coast of North Vietnam, was the turning point for LBJ and the cause for troops being sent in for military action. 

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