There were several soldiers of Irish origin in the 4th Kentucky Infantry CSA. One of them - Hugh McVey of Co. D - was a veteran of Waterloo. Recommended reading -
Fred Joyce (psuedonym for John Weller).
"The Irishmen of Company D, Fourth Kentucky Infantry."
The Southern Bivouac, Vol. 2, No. 6 (Feb. 1884), pp. 268-269 (Southern Bivouac magazine has been reprinted by broadfoot Books).