Mississippi, U.S., State Archives, Various Records, 1820-1951 [database on-line]. Lehi, UT, USA: Ancestry.com Operations, Inc., 2021.Original data: Mississippi, State Archives, Various Records, 1820-1951. Salt Lake City, UT, USA: FamilySearch, 2016.
This collection includes narratives from former slaves, land records from the Office of the Secretary of State, lists of military veterans, military grave registrations, and naturalization records.
You can learn more about this collection at the FamilySearch website.