Dear Mr. Jones,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located the record series titled Carded Records Showing Military Service of Soldiers Who Fought in Volunteer Organizations During the Spanish-American War. Portions of this series have been digitized, may be searched, and viewed through the Catalog, including all of the 1,236 service records for the 1st U. S. Volunteer Cavalry (Rough Riders). We did not locate the name “Mohr” among these results. You may wish to search the series yourself for possible variant names. To search, remove the *:* from the search bar and fill in a name.
This series is indexed by Indexes to the Carded Records of Soldiers Who Served in Volunteer Organizations During the Spanish-American War in Record Group 94, which has also been digitized in part. We searched the digitized cards in this series and came up with 21 results for Mohr. The full service records for these individuals have not yet been digitized.
To request a search for records that have not yet been digitized, please fill out a NATF 86 for service records and a NATF 85 for pension records and mail them to the addresses listed on the forms. You can also place your order online using eservices.archives.gov. For more information, please see Requesting Copies of Older (pre-WWI) Military Service Records.
Please note that the National Archives and Records Administration has suspended reproduction and digitization services until further notice due to COVID-19. Orders will not be serviced until operations can resume safely. We apologize for any inconvenience. Once operations resume, document reproduction requests will be filled in the order in which they were received.
We also searched online and located a digitized version of the book The Story of the Rough Riders, 1st U.S. Volunteer Cavalry: The Regiment in Camp and on the Battle Field. The book includes a section entitled “The Roster of the Rough Riders” on pages 259 through 320.
We hope this information is helpful. Best of luck with your research!
Saw a Frederick Muller, nowhere near the Mohr your seeking also searched last name spellings of Moore, and Morre.
Any other information you may have about him like a place of birth or a date might help.
This is from a book online about the Rough Riders https://www.bartleby.com/51/a.html shows the following
FIELD, STAFF, AND BAND COLONEL THEODORE ROOSEVELT TROOP A CAPTAIN FRANK FRANTZ TROOP B CAPTAIN JAMES H. MCCLINTOCK TROOP C CAPTAIN JOSEPH L. B. ALEXANDER TROOP D CAPTAIN R. B. HUSTON TROOP E CAPTAIN FREDERICK MULLER TROOP F CAPTAIN MAXIMILIAN LUNA TROOP G CAPTAIN WILLIAM H. H. LLEWELLEN TROOP H CAPTAIN GEORGE CURRY TROOP I CAPTAIN SCHUYLER A. MCGINNIS TROOP K CAPTAIN WOODBURY KANE TROOP L CAPTAIN RICHARD C. DAY TROOP M CAPTAIN ROBERT H. BRUCE