The best choice would be the Nanjing Massacre led to the increased tension between the United States and Japan in the year 1937. This is because didn't like what the Japanese did in China and in other parts of Asia. The killings they made to many are not really favorable to the U.S.
The Proclamation announced the acceptance of black men into the Union Army and Navy, enabling the liberated to become liberators
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It destroyed many factories in Germany, but factories in France and England were growing. Hope this helps!!!
