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What pull the United states into world War 1

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Germany began sinking U.S. trade and passenger ships which was costing American lives. President Woodrow Wilson didn't want this to continue so he asked Congress for a declaration of war on Germany.
User Aakash Dave
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The Germans sank a British ship which had American passengers. This was the first step. After this due to the unrestricted submarine warfare more US ships were sunk by German U-boats. 
User Serban Razvan
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