Here's a good book on Irish immigrants who wore the Gray. "Clear The Confederate Way: The Irish in the Army of Northern Virginia", by Kelly J. O'Grady; 2000, Savas Publishing Co, Macon, IA; ISBN: 1-8828-1042-2.

There is much about the "Recent Unpleasantness" that has been supressed and/or is greatly misunderstood. Our current notions of political correctness do nothing but further cloud the complex issues involved.