contexts: The United States declared war on Germany on April 6 , 1917 , over 2 ​ ⁄ years after World War I started . A ceasefire and Armistice was declared on November 11 , 1918 . Before entering the war , the U.S. had remained neutral , though it had been an important supplier to Great Britain and the other Allied powers .
name: United States in World War I
answers.input_text: short
answers.span_text: Germany
questions.input_text: who did us fight in world war 1