Lake Michigan

Lake Michigan is one of the five Great Lakes of North America, and the only one located entirely within the United States. The third-largest of the Great Lakes, it is bounded, from west to east, by Wisconsin, Illinois, Indiana, and Michigan.

Lake Michigan in Worldwar
The U.S. Army retreated to within a few miles of Lake Michigan in 1944, allowing the Race to overrun Chicago, which was then destroyed by an American atomic bomb.