On April 6, 1917 The U.S. enters World War I

1917 U.S. enters World War I On April 6, 1917, two days after the U.S. Senate votes 82 to 6 to declare war against Germany, the U.S. House of Representatives endorses the decision by a vote of 373 to 50, and the United States formally enters the First World War.

Learn More About World War I At The Centennial Series At The Russell Library

When World War I erupted in 1914, President Woodrow Wilson pledged neutrality for the United States, a position favored by the vast majority of Americans. Britain, however, was one of America’s closest trading partners, and tension soon arose between the United States and Germany over the latter’s attempted quarantine of the British Isles. Several U.S. ships traveling to Britain were damaged or sunk by German mines, and, in February 1915, Germany announced unrestricted warfare against all ships, neutral or otherwise, that entered the war zone around Britain. One month later, Germany announced that a German cruiser had sunk the William P. Frye, a private American vessel. President Wilson was outraged, but the German government apologized, calling the attack an unfortunate mistake.

The United States also crucially reinforced the strength of the Allied naval blockade of Germany, aimed at crushing Germany economically. American naval forces reached Britain on April 9, 1917, just three days after the declaration of war. By contrast, General John J. Pershing, the man appointed to command the U.S. Army in Europe, did not arrive until June 14; roughly a week later, the first 14,000 U.S. infantry troops landed in France to begin training for combat. Though the U.S. Army’s contributions began slowly, they would eventually mark a major turning point in the war effort and help the Allies to victory.

Learn More About World War I At The Centennial Series At The Russell Library