When railroads became a "thing" in the US and logistics were about to become one of the largest industries in America, the Railroads liked to hire Army logistics officers. Because those logistics officers knew how to manage large quantities of goods, and coordinate their arrival to a distant point. Cut to the 1930's with WW2 on the horizon, who did the US Army turn to better understand worldwide logistics? The railroad people, who knew not only all there was to know about moving product in the US, but also how to do it in Europe. Steel sharpens steel.