Answer :
Final answer:
The U.S. in World War I initially remained neutral at the outbreak of war in Europe in 1914. It was only in 1917, after events like the sinking of the Lusitania and the Zimmermann Telegram, that actively sided with the Allies.
Explanation:
The statement in your question is not entirely accurate. At the outbreak of war in Europe in the summer of 1914, the United States did not instantly rally behind Great Britain and France. Instead, the United States endeavored to stay neutral in this conflict.
President Woodrow Wilson officially declared the US's neutrality in August 1914. It wasn't until 1917, following certain events like the sinking of the Lusitania and the revelation of the Zimmermann Telegram, that the United States formally entered World War I on the side of the Allies, which consisted of France, Great Britain and Russia among others.
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