The way that Benjamin Franklin helped support an American victory was that he negotiated an alliance with France.
What did Benjamin Franklin do in the war?
Benjamin Franklin was sent to negotiate with the French for an alliance against the British.
His efforts worked and got the French interested in the war which then led to them joining on the Colonists' side and turning the tide of the war.
Find out more on the French in the Revolutionary War at https://brainly.com/question/3774952.
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