Concept
Version 12
Created by Boundless
The Call to Arms
American Expeditionary Force
Officers of the American Expeditionary Force, who would become crucial to the Allied war in Europe by 1918.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"American Expeditionary Force."
http://en.wikipedia.org/wiki/File:American_Expeditionary_Force_Baker_Mission.jpg
Wikipedia
Public domain.