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Dear Mr. Cox,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located a series titled Confederate Maps, 1861 - 1876 in the War Department Collection of Confederate Records (Record Group 109) that has been completely digitized. Also, please take a look at “A Guide to Civil War Map in the National Archives” as it may contain some helpful information.
In addition, the Library of Congress has a collection of Civil War Maps. For more information, please view their website.
We hope this information is helpful. Best of luck with your research!
HI Sylvia, thanks for the response. I had seed that record group 109 before, and though it doesn't include Louisiana, it seems like I may as well check the neighboring states in that region.