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The decision to declare war on Germany was greatly influenced by allied propaganda, American economic interests, and German naval policies. Although most Americans were against involvement in a European war these influences increased its position in the war. Th ....

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.... kept supplies from reaching German ports. By 1916, Germany was in serious need of food and other supplies. Germany fought back with submarines, which were called U-boats. Germany set up a submarine blockade to prevent supplies from getting to Great Britain. The U-boats destroyed many goods and supplies headed for Britain. On May 7, 1915, Germany fired on a passenger liner, the Lusitania. There were 1,198 passenger deaths, of which 128 were Americans. This prompted President Woodrow Wilson to push Germany to agree to naval warfare restrictions. By September, they agreed they would not attack passenger or non-threatening ships. In February, ....