Military Railway Service (United States)

The Military Railway Service was created in the 1920s as a reserve force of the United States Army. It had existed twice before: first as the United States Military Railroad during the American Civil War, and later as the United States Railroad Administration during World War I. In the original documentation in the creation of the service, all Class I railroad companies were to create a battalion for the war effort. Eleven Grand Divisions were formed and forty-six operating battalions were assigned; however, five were never activated.