The series contains original affidavits of registration that record personal information about each registrant, their photograph affixed to the majority of documents, and the registrants fingerprints. All of these are specific to Kansas, and most have the actual documents attached.
The compiled military service records of 1,235 Rough Riders, including Theodore Roosevelt, have been digitized. Each record features individual jackets detailing the soldier’s name, organization, rank, and medical records. The records also contain personal information and documentation descriptions. Discharges occurred for various reasons, such as age, ability, discipline issues, or hardship. This initiative provides significant insights into the personnel of the 1st U.S. Volunteer Cavalry during the Spanish-American War.