Ann

“The Irish recruits who poured into the army in 1846 were already accustomed to the realities of antebellum American nativism. The country had been rocked by anti-Catholic riots even before the famine produced new waves of Irish immigrants; in Boston, Protestant mobs had burned a convent in 1834, and Philadelphia had seen mob attacks on Irishmen ten years later. So the recent immigrants who enlisted for war with Mexico weren’t surprised to encounter nativists in the army. They were very much surprised, though, by the intensity of the anti-Irish sentiment they faced from their officers—a social sentiment that was expressed through official discipline.”
― Chris Bray, Court-Martial: How Military Justice Has Shaped America from the Revolution to 9/11 and Beyond