How Long Did the United States Engage in World War I- A Comprehensive Timeline
How Long Did the US Fight in WW1?
The United States’ involvement in World War I, known as the Great War, was relatively brief compared to the duration of the conflict. How long did the US fight in WW1? The U.S. entered the war on April 6, 1917, and its participation lasted until November 11, 1918, when the Armistice was signed, effectively ending the hostilities. This period of active involvement in the war was approximately 19 months.
The decision to enter the war was influenced by several factors, including the sinking of the RMS Lusitania by a German submarine in 1915, which killed 128 Americans, and the unrestricted submarine warfare conducted by Germany. However, the U.S. maintained a policy of neutrality until the final months of the war. Once the U.S. entered the conflict, it played a significant role in the Allied victory over the Central Powers. The American Expeditionary Force (AEF) contributed over 2 million troops to the war effort, and their involvement was crucial in the final push that led to the German surrender.
