On 2nd April 1917, President Woodrow Wilson went before a joint session of Congress to request a declaration of war against Germany. Wilson cited Germany’s violation of its pledge to suspend unrestricted submarine warfare in the North Atlantic and the Mediterranean, as well as its attempts to entice Mexico into an alliance against the United States, as his reasons for declaring war. On April 4, 1917, the U.S. Senate voted in support of the measure to declare war on Germany. The House concurred two days later.
Although 14,000 US infantry landed in France on 26th June 1917 to begin training, it would take at least 12 months before US troops were present on the Western Front in enough numbers to have any effect on the outcome of the war.
Following the Twenty-Second 