The Saint Patrick's Battalion was a military unit composed of several hundred immigrant Europeans who fought in the Mexican Army against the invasion of the United States in the so-called American Intervention in Mexico , from 1846 to 1848.
HOMBRES de Espiritu Libre... HOMBRES por un ideal... HEROES de verdad... ERIN GO BRAGH! MEN Free Spirit ... MEN for an ideal ... HEROES really ... ERIN GO BRAGH! The Chieftains - O'Sullivan's March - YouTube