After Lampart, the most famous Irishmen in Mexican history are probably "Los Patricios". Many communities also existed in Mexican Texas until the revolution there, when they sided with Roman Catholic Mexico against Protestant pro-US elements. The "Batallón de San Patricio", a battalion of US troops who deserted and fought alongside the Mexican Army against the United States in the Mexican–American War of 1846–1848, is well known in Mexican history.