A reason the Neutrality Acts were revised to allow cash-and-carry in the 1930s was

Fascist aggression in Europe, especially Germany and Italy’s expansion, made U.S. leaders want to help countries resisting them without directly entering the conflict. The cash-and-carry revision allowed nations at war to buy U.S. goods if they paid cash and transported them themselves. Thus, the reason was that fascism was gaining ground in Europe.

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