Dear Ms. Braun,
Thank you for posting your request on History Hub!
The Federal Government does not ordinarily create or maintain birth, death, marriage or divorce records. Such records are made and kept by State and local governments rather than the National Archives. Since marriage and divorce records before 1943 are held by the Clerk of the District Court in the county where the divorce was granted, we suggest that you contact Stillwater or Musselshell Counties to request the information you seek. In addition, the FamilySearch Research wiki for Montana Vital Records may be useful.
We hope this is helpful. Best of luck with your family research!
Dear Ms. Jensen,
thanks for your e-mail and with the relevant information.
The informations are looking promising.
Have a good one.