The Plaza was built in honor of veterans of World War I. The Museum is housed mainly on the lower level of the monument and honors the efforts of Hoosier soldiers in a timeline from the American Revolutionary War to modern conflicts. World War I and World War II are featured most prominently. Aside from firearms, it features a Cobra helicopter and the USS Indiana's commission plate. There are over 400 military flags housed in the Museum, more than 300 of which are from the American Civil War. Indiana's Liberty Bell replica is located near the main entrance.