
Dáire Ó Niallagáin (born 1815) was an Irish-American soldier who served in the Union Army's 2nd United States Infantry Regiment during the American Civil War. He fought at the Battle of Antietam in September 1862.
Dáire Ó Niallagáin (born 1815) was an Irish-American soldier who served in the Union Army's 2nd United States Infantry Regiment during the American Civil War. He fought at the Battle of Antietam in September 1862.