How would taking control of the port cities such as New York and
Philadelphia help the Colonists
during the American Revolution?

America “lost” South Vietnam because it was an artificial construct created in the wake of the French loss of Indochina. Because there never was an “organic” nation of South Vietnam, when the U.S. discontinued to invest military assets into that construct, it eventually ceased to exist. Hope this helps^_^

Explanation:

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