This is the only T. Halligan I find in Confederate organizations.

Thomas Jasper Halligan

Residence Chatham County GA;
Enlisted on 5/30/1861 as a Private.
On 5/30/1861 he mustered into "C" Co. GA 1st Infantry
(date and method of discharge not given)
On 4/12/1862 he mustered into "K" Co. GA 63rd Infantry
(date and method of discharge not given)
He was listed as:
* Detailed 2/28/1864 (place not stated) (By Col. Gordon. No further record.)
Intra Regimental Company Transfers:
* 12/6/1862 from company K to company D
* 10/5/1863 from company D to company K

.........

Thomas Jasper Halligan

Residence Chatham County GA;
Enlisted on 5/31/1861 as a Private.
On 5/31/1861 he mustered into "C" Co. GA 1st Infantry
He was transferred out on 4/26/1862
On 4/26/1862 he transferred into "B" Co. GA 13th Battn Infantry
He was transferred out on 12/1/1862
On 12/1/1862 he transferred into "K" Co. GA 63rd Infantry
(date and method of discharge not given)
Intra Regimental Company Transfers:
* 4/12/1862 from company C to company Gordon's
* 12/6/1862 from company K to company D
* 10/5/1863 from company D to company K

Sources used by Historical Data Systems, Inc.:
- Roster of Confederate Soldiers of Georgia 1861-1865

................

Thomas [Jasper] Halligan, Private, Company B, Phoenix Battalion,* enlisted April 12, 1862 at Thunderbolt Battery by Capt. Geo. A. Gordon for 3 years or for the war, detailed on Special Service in Savannah, July, 1862, Gas Fitter, transferred to Company D, December 6, 1862, transferred to Company K, 63rd Georgia Regt. October 5, 1863, his file contains correspondence between the Adjutant General War Department and the Georgia State Board of Pension Commissioners dated March 8, 1916

* This company was successively designated as Company B, Phoenix Battalion; Company B, 13th Battalion Georgia Infantry; Company K, Gordon's Regiment Georgia Infantry; and Company K, 63rd Regiment Georgia Infantry

M266: Compiled Service Records of Confederate Soldiers Who Served in Organizations from the State of Georgia