Explore Chicago Collections
https://explore.chicagocollections.org/records/?f4-types=Archival%20Collections&f3-institutions=Chicago%20History%20Museum&f2-cities=Wheaton&f5-topics=Events%20%26%20Movements%3A%3ACivil%20War&f6-topics=Events%20%26%20Movements%3A%3ACivil%20War