St. Patrick’s Day is a good opportunity to tell a little-known Irish (and Mexican) story. El Batallon de San Patricio, also known as the St. Patrick’s Battalion, was a group of Irish and other immigrant soldiers who fought for Mexico during the Mexican-American War, which took place in the mid 19th century. The battalion’s story is one of loyalty, bravery, and sacrifice in the face of conflict and discrimination.

The San Patricio Battalion was composed mainly of Irish immigrants who had fled to Mexico in search of a better life. These immigrants, many of whom were Catholic, found a welcoming home in Mexico, which shared many cultural and religious similarities with their native homeland. As the Mexican-American War broke out in 1846, many of these immigrants joined the Mexican army to fight against the invading American forces. The battalion’s name comes from St. Patrick, the patron saint of Ireland, and its distinctive green uniforms, which were a nod to the battalion’s Irish heritage. The San Patricio Battalion was primarily made up of deserters from the US army, who were motivated by a sense of loyalty to their fellow Irish and the Catholic Mexicans who had welcomed them. Many of these deserters were also disillusioned with the American government’s treatment of immigrants and the Catholic Church.

The San Patricio Battalion fought in several key battles during the Mexican-American War, including the Battle of Monterrey and the Battle of Buena Vista. They were known for their bravery and dedication to the Mexican cause, often fighting in the front lines and leading daring raids against the American forces. Despite their bravery, the battalion was ultimately defeated by the overwhelming American forces and forced to surrender. The captured members of the San Patricio Battalion were subjected to harsh treatment by the American army, including public flogging and execution by hanging. This treatment was in part a result of the American government’s anti-immigrant sentiment, which saw the Irish and other immigrant groups as a threat to American society. The San Patricio Battalion’s story is a reminder of the discrimination and injustice faced by immigrant communities throughout history.

The legacy of the San Patricio Battalion lives on in both Mexico and Ireland. In Mexico, the battalion is celebrated for its heroes who fought for their adopted country and against the forces of imperialism. In Ireland, the battalion is seen as a symbol of the struggles that Irish immigrants faced around the world and their fight for justice and equality. The San Patricio Battalion’s story is also a reminder of the complexities of war and the different perspectives and motivations that drive individuals to fight. The members of the battalion were not simply traitors or deserters but rather individuals, whose sense of loyalty and a desire for justice motivated them more than anything else.

St. Patrick’s Day is a reminder of the Irish people and the extremely large Irish diaspora population, especially here in the United States. As the story of the San Patricio Battalion shows, that diaspora extends into Latin America—from Mexico all the way to Chile. But that, as they say, is another story.