The United States later declared war on German ally Austria-Hungary on December 7, 1917. World War I Trenches in France. Germany’s resumption of submarine attacks on passenger and merchant ships in 1917 became the primary motivation behind Wilson’s decision to lead the United States into World War I.
https://history.state.gov/milestones/1914-1920/wwi
The United States entered World War I because of a boat and a note. The boat was the Lusitania, which was sunk by German U-boats. This angered the Americans, but that was not what led them into the war.
http://www.enotes.com/homework-help/why-did-united-states-enter-world-war-400883
Germany’s resumption of submarine attacks on passenger and merchant ships in 1917 became the primary motivation behind Wilson’s decision to lead the United States into World War I.
https://history.state.gov/milestones/1914-1920/wwi
The United States entered World War 1 when they had a note given to them from the British that was from Germany. It was a note to Mexico, called the Zimmerman Note. Germany promised Mexico the land that America took from them earlier (like Texas and Arizona) if they helped Germany win the war.
http://www.enotes.com/homework-help/why-did-united-states-enter-world-war-400883
Since the beginning of World War I in 1914, the United States, under President Woodrow Wilson, had maintained strict neutrality, other than providing material assistance to the Allies.
http://www.enotes.com/homework-help/why-did-united-states-enter-world-war-400883
Although World War I began in 1914, the United States did not join the war until 1917. The impact of the United States joining the war was significant. The additional firepower, resources, and soldiers of the U.S. helped to tip the balance of the war in favor of the Allies.
http://www.ducksters.com/history/world_war_i/united_states_in_ww1.php
History World War I. Although World War I began in 1914, the United States did not join the war until 1917. The impact of the United States joining the war was significant. The additional firepower, resources, and soldiers of the U.S. helped to tip the balance of the war in favor of the Allies.
http://www.ducksters.com/history/world_war_i/united_states_in_ww1.php
A t 8:30 on the evening of April 2, 1917, President Wilson appeared before a joint session of Congress and asked for a declaration of war against Germany in order to make the world safe for democracy.. On April 4, Congress granted Wilson's request.
http://www.eyewitnesstohistory.com/wilsonwar.htm
Background of the Axis and Allied powers. As in World War I, the United States, Great Britian, France, and the 47 countries siding with them were known as the Allies. Japan`s attack on Pearl Harbor in 1941 brought the United States into the war on the Allied side.
http://www.u-s-history.com/pages/h1661.html
on Germany, 1917. A t 8:30 on the evening of April 2, 1917, President Wilson appeared before a joint session of Congress and asked for a declaration of war against Germany in order to make the world safe for democracy.. On April 4, Congress granted Wilson's request.
http://www.eyewitnesstohistory.com/wilsonwar.htm
what finally pushed the united states into ww1
Germany’s resumption of submarine attacks on passenger and merchant ships in 1917 became the primary motivation behind Wilson’s decision to lead the United States into World War I.