On August 31, 1935, Congress passed the first Neutrality Act prohibiting the export of “arms, ammunition, and implements of war” from the United States to foreign nations at war and requiring arms manufacturers in the United States to apply for an export license.
- prohibited the sale of arms to any belligerent nations.
Neutrality Act of 1937
The outbreak of the Spanish Civil War in 1936 and the rising tide of fascism in Europe increased support for extending and expanding the Neutrality Act of 1937. Under this law, U.S.citizens were forbidden from traveling on belligerent ships, and American merchant ships were prevented from transporting arms to belligerents even if those arms were produced outside of the United States.
Therefore, the correct answer is the prohibition of sale of arms.
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