American Expeditionary Forces on the Western Front (World War I) order of battle

This is the American Expeditionary Forces on the Western Front order of battle. The American Expeditionary Forces (AEF) consisted of the United States Armed Forces (mostly the United States Army) that were sent to Europe in World War I to support the Allied cause against the Central Powers. During the United States campaigns in World War I the AEF fought in France alongside French and British allied forces in the last year of the war, against Imperial German forces. Some of the troops fought alongside Italian forces in that same year, against Austro-Hungarian forces. Late in the war American units also fought in Siberia and North Russia.

President Woodrow Wilson created the AEF in May 1917, originally appointing Major General John J. Pershing, who was later promoted to general, as commander. Barely any American troops were sent to Europe in 1917, since Pershing ordered all AEF forces to be well-trained before going overseas.

The troop ships used to transport the AEF were, at first, any ships that were available. Cruisers, seized German ships, borrowed Allied ships, and many other ships were used to ship troops to Europe from ports in New York, New Jersey, and Virginia. By June 1917, only 14,000 soldiers had made it to the front lines, but by May 1918 over one million American troops had reached Europe, with around half of them on the front lines.

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