Pritzker Military Library

The Pritzker Military Museum & Library (formerly Pritzker Military Library) is a museum and a research library for the study of military history in Chicago, Illinois, United States. It was founded in 2003 by Colonel (IL) Jennifer N. Pritzker, IL ARNG (Ret.), then known as James Pritzker, to be a non-partisan institution for the study of "the citizen soldier as an essential element for the preservation of democracy". Originally located in the Streeterville neighborhood at 610 N. Fairbanks Court, the library later moved to 104 S. Michigan Avenue in the Loop. The library is supported by donations and membership.

More information on the Wikipedia page.

The website is.