Title: Diplomatic history of World War I
Content:  American entry into the war came in April 1917, after 2½ years of efforts by President Woodrow Wilson to keep the United States neutral.
Title: United States in World War I
Content:  The American entry into World War I came on April 6, 1917, after a year long effort by President Woodrow Wilson to get the United States into the war. Apart from an Anglophile element urging early support for the British, American public opinion sentiment for neutrality was particularly strong among Irish Americans, German Americans and Scandinavian Americans, as well as among church leaders and among women in general. On the other hand, even before World War I had broken out, American opinion had been more negative toward Germany than towards any other country in Europe. Over time, especially after reports of atrocities 
Title: United States in World War I
Content:   The United States declared war on Germany on April 6, 1917, nearly three 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 the United Kingdom, France, and the other powers of the Allies of World War I. The U.S. made its major contributions in terms of supplies, raw material, and money, starting in 1917. American soldiers under General of the Armies John Pershing, Commander-in-Chief of the American Expeditionary Force (AEF), arrived at the rate of 10,000 men a day on the Western Front in the summer of 1918. 
Title: Axis &amp; Allies: World War I 1914
Content:  The United States may not enter the war until the beginning of round 4 unless it is attacked by a central powers player. The United States' Navy may also not leave sea zone 1
Title: Edmund Kayser
Content:  World War I had started on July 28, 1914, when the Austro-Hungarian Empire declared war on Serbia. By 1916, nearly all of the European nations and empires had entered the war. The United States maintained its neutrality and some of its sizeable German population supported Imperial Germany and its Axis of Central Powers that was fighting the Entente Powers. In the 1910 census there were 2.3 million German-born immigrants living in the United States and 550 German newspapers in the country. The large number of German-Americans was also a factor in keeping America out of World War I until the fighting had been going on for three years.
Title: American entry into World War I
Content:   The American entry into World War I came in April 1917, more than two and a half years after the war began in Europe. Apart from an Anglophile element urging early support for the British and an anti-Tsarist element sympathizing with Germany's war against Russia, American public opinion had generally reflected a desire to stay out of the war: the sentiment for neutrality was particularly strong among Irish Americans, German Americans, and Scandinavian Americans, as well as among church leaders and women in general. On the other hand, even before World War I had broken out, American opinion had been overall more negative toward Germany than 
Title: American entry into World War I
Content:  In early 1917, Kaiser Wilhelm II forced the issue. His declared decision on 31 January 1917 to target neutral shipping in a designated war-zone became the immediate cause of the entry of the United States into the war. Kaiser Wilhelm II sunk ten American merchant ships from February 3, 1917 through April 4, 1917 (but news about the schooner Marguerite didn't arrive until after Wilson signed the declaration of war). Outraged public opinion now overwhelmingly supported Wilson when he asked Congress for a declaration of war on April 2, 1917. It was voted approved by a Joint Session (not merely the Senate) on April 6, 1917 & Wilson signed it the following afternoon.
Title: 113th Engineer Battalion (United States)
Content:  On 6 April 1917, the United States entered World War I on the side of Great Britain, France, and Russia. Prior to 1917, the United States Army was smaller than 13 of the nations already involved in the War, with around 121,000 active duty soldiers and around 181,000 National Guardsmen. However, with the U.S.'s entry into the War, the Selective Service Act of 1917 was put into effect. 4 million men were drafted into service, and the Army expanded significantly. New units were formed, and existing units were moved around to meet the Army's growing numbers. Among these new units was the 38th Infantry Division, activated as a National Guard Division in 
Title: United States Navy operations during World War I
Content:  United States Navy operations during World War I began on April 6, 1917, after the formal declaration of war on the German Empire. The American navy focused on countering enemy U-boats in the Atlantic Ocean and the Mediterranean Sea, while convoying men and supplies to France and Italy. Because of United States' late entry into the war, her capital ships never engaged the German fleet, and few decisive submarine actions occurred.
Title: American entry into World War I
Content:  On April 2, 1917, Wilson asked a special joint session of Congress to declare war on the German Empire, stating, "We have no selfish ends to serve". To make the conflict seem like a better idea, he painted the conflict idealistically, stating that the war would "make the world safe for democracy" and later that it would be a "war to end war". The United States had a moral responsibility to enter the war, Wilson proclaimed. The future of the world was being determined on the battlefield, and American national interest demanded a voice. Wilson's definition of the situation won wide acclaim, and, indeed, has shaped 

Question: when did united states enter world war i?
Answer: April 1917.