Las Mexicano ~ El Maorto ~ El Gringo Tee
Brand Hobo Jack
There are several conjectures within folk etymology that purport to derive the origin of gringo from word coincidences.
When the Mexican-American War began in 1846, several hundred recently immigrated Irish, German, and other Roman Catholic Americans who were sent by the U.S. government to fight against Mexico came to question why they were fighting against a Catholic country for a Protestant one, combined with resentment over their treatment by their Anglo-Protestant officers, and deserted to join forces with Mexico. Led by Captain Jon Riley of County Galway, they called themselves St. Patrick's Battalion (in Spanish, Battalion de San Patricio, and frequently sang the song "Green Grow the Rushes, O"