Johnny McEvoy's recording of LINCOLN'S ARMY appears on 2 albums: "Ireland's Original Johnny McEvoy," Rego, 1993; and "The Essential Johnny McEvoy," a.k.a. "The Essential Collection," Dara, 2004. Apparently it's his own composition.

The Irish Rovers also recorded it on their album "Come Fill Up Your Glasses," 1998.

I wasn't able to find any sound samples or lyrics.

I know of one other song on the same subject that you might like: BY THE HUSH, also known as PADDY'S LAMENTATION, which is discussed in this thread: Lyr Add: Paddy's Lamentation, and some other threads that you can link to from there.