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Declaration of Neutrality
President Woodrow Wilson officially announced the United States as neutral in the war. -
Lusitania
German U-boats sink the Lusitania, and 1.198 civilians were killed. (128 americans) -
Sussex Pledge Made
Germany responds to President Woodrow Wilson by agreeing to limit its submarine warfare in order to avert a diplomatic break with the U.S. -
Zimmerman Note
The United States intercepted a note from Germany to Mexico asking to make an alliance against the U.S. It was translated by the British for the U.S. -
Sussex Pledge Ended
Germany redeclares unrestricted submarine warfare. -
3 American ships targeted
3 more U.S. trade ships were targeted and sunk by German U-boats. -
Declaration of War
Congress authorizes a declaration of war against Germany, the U.S. enters war as allies with France and Britain.