Military Railway Service (United States)

The Military Railway Service was created in the 1920s as a reserve force of the United States Army.

In the original documentation in the creation of the service, all Class I railroad companies were to create a battalion for the war effort.

The 1st and 2nd Military Railway Service (MRS) controlled supply by rail in the European Theater of Operations (ETO).

The 1st was assigned to the Mediterranean with Italy, North Africa, and southern France as its main areas of operations.

The 1st MRS was led by Brigadier General Carl R. Gray Jr., an executive from the Chicago, St. Paul, Minneapolis & Omaha Railroad, who was the son of Carl R. Gray Sr., the former president of multiple railways in the United States, including the Union Pacific.