Answer: General William Westmoreland
Details: President Lyndon Johnson appointed General William Westmoreland to replace General Paul Harkins as head of the United States Military Assistance Command Vietnam (MACV) in June, 1964.
The buildup of American military presence in Vietnam from 16,000 troops to over 500,000 troops occurred under Westmoreland's leadership, as well as President Johnson's initiative. The ongoing stalemate in Vietnam, in spite of those enormous troop increases, brought about much anti-war sentiment back home in the United States. Plenty of the dissatisfaction was aimed at General Westmoreland. In 1968, President Johnson replaced Westmoreland with General Creighton Abrams as head of MACV.
The economic factors were desires to find new markets for trade. By extending colonial power throughout the world, the US would have new trading partners and markets.
The gulf of Tonkin incident led the United States Congress
to overwhelming approve the Gulf of Tonkin Resolution. This resolution gave
President Lyndon B. Johnson virtually unlimited powers to oppose communist
aggression in Southeast Asia. President Lyndon was also advised on how any
potential war with the North Vietnamese might be fought.
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