Treaty of Guadalupe Hidalgo

Each year tens of thousands of Irish-Americans proudly celebrate their heritage on St Patrick Day, yet few are aware of the fate of the Irish in the St Patrick’s Battalion (el Batallón de San Patricio) who chose to fight under their green flag for Mexico against the aggression of the United States in the Mexican-American War of 1846-48 .

Y estábamos pasando el río cuando nos fusilaron con los máuseres. Me devolví porque él me dijo: ‘Sácame de aquí, paisano, no me dejes.’
— Juan Rulfo, El llano en llamas