In what year did the United States formally enter World War I?

Name: In what year did the United States formally enter World War I?
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Question

In what year did the United States formally enter World War I? ​

Quizplus · Accepted Answer

The United States formally entered World War I in 1917 after three years of being neutral. President Woodrow Wilson had campaigned for re-election in 1916 on the slogan "He kept us out of war," but eventually, the sinking of the Lusitania, the Zimmerman Telegram, and other events convinced him to ask Congress to declare war on Germany.

In What Year Did the United States Formally Enter World