American unifom WWI

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American Expeditionary Forces were a part of the United States Army during World War I. They arrived in Europe in 1917 and played a significant role in the war's final year. The US military presence was initially small, but it expanded rapidly as the conflict dragged on. The American forces were organized into separate divisions, with each division consisting of infantry, artillery, engineers, and other support units. The army also had its own air force and medical corps.