This map depicts the corridor for flight navigation between Rantoul, Illinois, and Mount Clemens, Michigan, including major urban areas, roads,... Show moreThis map depicts the corridor for flight navigation between Rantoul, Illinois, and Mount Clemens, Michigan, including major urban areas, roads, railroads, etc., and the location of airfields, sea-plane landings, and navigation beacons. It was compiled and produced by the Information Division, Office of Chief of Air Corps, at the Engineer Reproduction plant, U.S. Army, Washington D.C., in 1929 and revised in 1932. Show less