Catalyst for U.S. Entry in WWI

Very Easy Period 7: 1890–1945 World War I

During World War I, the United States initially adopted a stance of neutrality in the conflict that began in 1914. However, various factors eventually led to the U.S. entering the war in 1917. The war was characterized by trench warfare, new technologies in weaponry, and significant global alliances.

Which event was the primary catalyst for the United States' decision to enter World War I?

The Lusitania was sunk by a German U-boat.

The Treaty of Versailles was signed.

The Russian Revolution occurred.

Germany declared unrestricted submarine warfare.

Hint

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