Batallón de San Patricio! Soft enamel pin

The Saint Patrick's Battalion (Spanish: Batallón de San Patricio, later reorganized as the Foreign Legion of Patricios) was a unit of 175 to several hundred (accounts vary) immigrants and expatriates of European descent who fought as part of the Mexican Army against the United States in the Mexican–American War of 1846–48. Formed and led by John Riley, the battalion's members included many who had deserted or defected from the United States Army