The Montana Historical Society, which is located in Helena, has a large collection of military records on file. Those records cover the Spanish American War, as well as World War I, World War II, and Early enlistment papers for the National Guard. All of those records are arranged in alphabetical order by last name on a series of 60,000 cards. Those cards include the person’s name, enlistment date and location, age upon joining, address, service record, service number, discharge information, and more. So, they can be quite useful to genealogical researchers.
Montana Modern Wars
War Website Links