What method did the U.S. government implement in December 1917 to support war efforts?

The U.S. government implemented control of railroads during December 1917 as a method to support war efforts. This control was part of an effort to ensure efficient transportation of troops and supplies across the country, which was crucial for military operations during World War I. By nationalizing the railroads, the government aimed to optimize logistics and maintain a steady flow of resources that were necessary for the war effort.

This action was seen as vital for coordinating various aspects of military logistics and supporting the economy during wartime. Other measures, such as the draft, were certainly significant in mobilizing military personnel, but in December 1917, the immediate step taken was to regulate and control the railroad system to facilitate the broader war effort effectively.