Henry O. Smoak, age 24, Private, Captain Glover’s Company (Edisto Rifles), 1st Regiment South Carolina Volunteers,* enlisted August 22,1861 at Summerville by Capt. Glover for 12 months, last recorded present April 12, 1862

* This company subsequently became (1st) Company A, 1st (Hagood’s) Regiment South Carolina Infantry.

The regiment was organized about April 12, 1861, for twelve months, and was re-organized for the war in April, 1862.

Most of the re-enlisted men of this company subsequently served in Company G, 25th Regiment South Carolina Infantry

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H. O. Smoak, Private, Company I, 1st Regiment South Carolina Artillery,** enlisted April 9/17/19/27, 1862 at Fort Johnson by Capt. Brown for the war, recorded on the Sep/Oct, 1862 muster roll as a Musician, Field & Staff, last recorded present at the Nov/Dec, 1864 muster

Note, there are no further F & S muster rolls in the records

** This company was successively designated as Captain Frederick’s Artillery Company; Company A, Lamar’s Battalion of Artillery; Company I, 1st Regiment South Carolina Artillery; and Company I, 2nd Regiment South Carolina Artillery

M267: Compiled Service Records of Confederate Soldiers Who Served in Organizations from the State of South Carolina

From their Record of Events found in the Compiled Service Records, they served their entire time on James Island, at places called: East Lines, New Lines, Camp Lamar, Fort Johnson, and Secessionville.

Confederate forces were able to hold onto the post [Ft. Johnson] until it was abandoned February 17, 1865 along with other harbor defenses as Union troops under Sherman approached the city.

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The 2nd Heavy Artillery Regiment was organized at Charleston, South Carolina, during the spring of 1862 using the 2nd Battalion, South Carolina Artillery as its nucleus. The 2nd (also known as the 1st) Regiment South Carolina Artillery was formed by the addition of six companies to the 2nd (also known as Lamar's Battalion South Carolina Artillery) which had been organized in the latter part of 1861 with four companies. Company D served as light artillery. The remainder of the regiment served as heavy artillery and infantry.

The 2nd Artillery Regiment spent the majority of the war in and around Charleston. Many of the men were recruited in the counties of Sumter, Darlington, and Charleston. In 1865 it was converted to infantry. It surrendered with the Army of Tennessee at Durham Station, Orange County, North Carolina on April 26, 1865. Many of the members of the 2nd South Artillery are buried around the Orangeburg area.
https://familysearch.org/learn/wiki/en/2nd_Regiment,_South_Carolina_Artillery