Please accept my apologies for offering information at variance with what you already have. Allow me explain.
After returning from prisoner-of-war camp, members of the 4th Confederate Regiment (AKA 1st Alabama-Tennessee-Mississippi) from Tennessee reenlisted and were assigned to a Tennessee regiment. The others were assigned to a new regiment, the 54th Alabama, also commanded by Col. Alpheus Baker. The company from Choctaw County became Co. "F" of the 54th Alabama Regt. Men from the old 4th Confederate regiment could have reenlisted in other commands, such as the 37th Mississippi, but most elected to stay together in the same company.
During this search I found the name can look like 'Barnes'. I've already posted about Mathias R. Baines not having a service record with the 37th Mississippi. While using the name 'Barnes' in my efforts to locate another service file for MRB, I found a record for Mathew R. Barnes with the 54th Alabama, right where Mathias should be. This man came from Choctaw County and has a detailed physical description on record. Giving an enlistment date from memory as Nov. 15, 1861, this man took the oath of allegiance to the U.S. at Nashville TN, Jan. 21, 1865.
Despite all this, it's entirely possible for MRB to have a pension application for service with the 37th Mississippi Regt. Here are a few points to remember about pension applications. Financial needs after the war were significant, so veterans and widows were anxious to have their appications accepted. People understood that applications would be researched and those submitted by deserters would be rejected. On the other hand, officials on the pension board knew that
Records of the 37th Mississippi are complete through mid-1864, so we can be reasonably certain that MRB never served with that regiment.
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