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The u.s entered the war because of unrestricted submarine warfare . Germany sunk the u.s ship, lusitania killing 1,198 people.another reason the u.s entered the war was because of the Zimmerman note that Germany sent Mexico,saying that if Mexico invaded the u.s they would gain all the land they lost when they fought the Mexico American war.

The u.s entered the war because of unrestricted submarine warfare . Germany sunk the u.s ship, lusitania killing 1,198 people.another reason the u.s entered the war was because of the Zimmerman note that Germany sent Mexico,saying that if Mexico invaded the u.s they would gain all the land they lost when they fought the Mexico American war.

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13y ago

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At first the US was weary about entering World War 1, as the American populace had no interest in foreign wars. However, the sinking of the Lusitania, a cruise ship with many Americans aboard, galvanized popular opinion in support of going to war.

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10y ago
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In 1917 the Zimmermann Telegram was made public, sparking outrage across the US. It was a message from Germany to Mexico, urging them to invade the American Southwest in return for their former territories Texas, New Mexico, and Arizona. The incident, along with the sinking of the Lusitania in 1915 and suspected sabotage in 1916, turned American public opinion in support of US entry into World War 1.

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10y ago
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mostly because the people wanted America to go but also because they sunk a ship called the LUSTANIA which carried 100 Americans in it and provisiond destined to Americans and british armies

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13y ago
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Q: Why did us join the war in 1917?
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