The 1st Tennessee Heavy Artillery Regiment was organized at Fort Pillow, Tennessee, on May 10, 1862, composed of ten companies which had previously served as independent batteries. Dismukes' Arkansas Battery was designated as Company B, and Hoadley's Arkansas Battery as Company H. On June 18, 1862, the regiment was temporarily consolidated into four companies. Company A was composed of Dismukes' (old) Co. B and part of Maley's (old) Co. C. Company B was composed of Parks' [formerly Hoadley's] (old) Co. H, along with (old) Cos. A and G and part of (old) Co. C. Hoadley was promoted to major. On February 4, 1864, the regiment was further consolidated into two companies, (3rd) Co. A and (3rd) Co. B. The last reference of this command in the historical record is dated November 19, 1864, when a siege train company, 1st Tennessee Heavy Artillery, under Capt. Paul T. Dismukes, is listed among the forces of the Trans-Mississippi Department.

As far as I can tell, Dismukes' company served as heavy artillery throughout the war, but the picture of this regiment is pretty murky from 1863 onwards, so I can't say for certain that they didn't serve a stint as light artillery, though I've seen no evidence of it.