The compiled service records of volunteer soldiers who served in the Mexican War consist of a jacket-envelope for each soldier, labeled with his name and rank and the unit in which he served. A jacket-envelope typically contains: (1) card abstracts of entries relating to the individual soldier as found in original muster rolls, returns, payrolls, company and regimental books, hospital registers, and lists of deserters; (2) originals of any papers relating solely to the soldier, such as correspondence and requests for leaves of absence; and (3) notation cards giving supplemental information not found on the card abstracts. There are also cross-reference jacket-envelopes to indicate soldiers' names that appear in the records under more than one spelling. These compiled service records are part of the Records of the Adjutant General's Office, 1780's-1917, Record Group 94.
This description and much of the remaining information on this page is taken directly from the descriptive pamphlets prepared by NARA for each title. Links to the descriptive pamphlets are provided below.