This Information was extracted and transcribed from Francis R. Heitman's Historical Register and Dictionary of the United States Army from Its Organization, September 29, 1789, to March 2, 1903; the complete list is located at the US Army Military History Institute.

All the soldiers listed here:

Were born in Ireland;

• Were in the US or CS military during the American Civil War, servicing as cadets, enlisted men, or officers;

• Received an officer's commission from the US Government (not their state government) some time during their military service; this could be before, during, or after the Civil War.


I opted not to include Irish Americans here.  While the Register lists many other soldiers, born in America, with obviously Irish surnames, there are likely even more Irish Americans with surnames not so readily identified as Irish.  So in justice to the latter, I elected not to include the former.

I came across two Irish-born Confederates with pre-war service as US Army officers.

The class standing of graduates of the US Military Academy (West Point) follows their appointment date.

Please keep in mind that while it has a wealth of information,  Heitman is a secondary source of information.  Any compilation has a  risk of containing errors, and is not definitive.  Make sure you weigh the info against other evidence before accepting it.