Explore Chicago Collections
https://explore.chicagocollections.org/records/?browse-names=yes&sort=title&f4-topics=Events+%26+Movements%3A%3AWorld+War+I&f2-topics=Government+%26+Leadership%3A%3APolitics&f1-names=Eckenfelder%2C+L.C.%2C+Le+Commandant&f3-cities=Chicago&f5-topics=Events%20%26%20Movements::Wars