American troops advancing on the Western Front, March 1918. The United States became directly involved in World War I after declaring war on Germany on April 6, 1917.

Apr 6, 2017 · The United States entered World War I in 1917, following the sinking of the British ocean liner Lusitania and the shocking discovery of the Zimmermann telegram.

2 days ago · World War I: U.S. Army recruits U.S. Army recruits at Camp Pike, Arkansas, in 1918, following the United States' entry into World War I in April 1917. The American military contribution was as important as the economic one.

The United States entered into World War I on 6 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.

In the summer of 1914, the assassination of Archduke Franz Ferdinand, heir to the Austro-Hungarian Empire, ignited a continental war between the Central Powers of Germany, Austria-Hungary, and the Ottoman Empire and the Allies of France, Great Britain, Russia, and Italy.

The United States campaigns in World War I began after American entry in the war in early April 1917. The American Expeditionary Force (AEF) served on the Western Front, under General John J. Pershing, and engaged in 13 official military campaigns between 1917 and 1918, for which campaign streamers were designated.

Learn about the events that led the U.S. to enter WWI in 1917. Why did the U.S. Fight in WWI? Why did America enter World War I? When WWI began in Europe in 1914, many Americans wanted the United States to stay out of the conflict, supporting President Woodrow Wilson’s policy of strict and impartial neutrality.

On April 6, 1917, the United States of America officially entered World War I. Over the next year and a half, millions of Americans served overseas and supported the nation’s war effort at home. Their contributions helped win the war and shaped both America and the world for generations.

Two days after the U.S. Senate voted 82 to 6 to declare war against Germany, the U.S. House of Representatives endorses the declaration by a vote of 373 to 50, and America formally enters...

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.