There have been two 20th Divisions in the history of the United States Army.
In early 1917, the 20th Division was established as a National Guard formation consisting of units of the Idaho, Montana, Oregon, Washington, and Wyoming Army National Guards.[1] On 1 April 1917, this division was activated for federal service as the 41st Division.[1]
In August 1918, fourteen months after the American entry into World War I, another 20th Division was organized.[2] This was a regular army and national army division intended for service in World War I.[3] The Armistice of November 11, 1918 ended the war before the 20th Division departed for France, and it was demobilized in February 1919.[3]
The 20th Division organized and trained at Camp Sevier, South Carolina.[3] Its composition included the 39th Infantry Brigade (48th and 89th Infantry Regiments) and the 40th Infantry Brigade (50th, 90th Infantry Regiments), plus the 58th Artillery Regiment.[4]
Commanders of the 20th Division included:[4]
1918
1919