In the summer of 1914, war broke out in Europe with Germany and Ausrtia-Hungary leading Central Powers going against Britain, France, and Russia who are leading Allied countries. During the beginning of the war, President Woodrow Wilson of the United states claimed to be neutral in this war, however, their neutrality was controversial and debated over in the U.S.
Warfare using submarines in the Atlantic tensions rather high as Germany destroyed the British ocean liner on May 7, 1915 located in Lusitania. This resulted in the death of more than 120 U.S citizens and provoked the U.S. In attempt to meddle into the affairs between U.S and Mexico, Germany attacked American ships and dragged the U.S into war. Having to join the Allied power, on April 6, 1917, the United States declared war on Germany