Were 12 month enlistees then required to re-enlist for the remainder of the war? See the following:
John Salmon enlisted as a Pvt., age 25, on March 10, 1862, Navarro Co., TX in Co. B (D), 29th Texas Cav., Capt. F.M. Martin's Co., Bss' Reg't Texas Mounted Volunteers. John's record shows the following:
1. Company Muster-in Roll. Roll dated at Camp Bass Mch. 15, 1862. Joined for duty and enrolled Mch. 10, 1862 b F.M. Martin for 12 months.