The Civil War Museum looks at the war from the perspective of the Upper Midwest: Wisconsin, Illinois, Indiana, Iowa, Michigan, and Minnesota. That regional angle is what makes it more than another battlefield museum. The exhibits follow soldiers south, but they also stay with the families, farms, factories, and politics that shaped the war effort from the Great Lakes.
The main gallery is immersive without being theatrical for its own sake. If you have already visited the lakefront museums, this is the one that best explains why Kenosha and the surrounding region mattered beyond local history.