José Francisco de San Martín y Matorras was born on February 25, 1778—though some documents from the period suggest 1777—in the village of Yapeyú, in what is now northern Argentina. He was the son of Colonel Juan de San Martín, a Spaniard who held the position of lieutenant governor of the Guaraní Missions, based in that locality since 1774, and Gregoria Matorras, the niece of a conquistador from the Chaco region. In 1781, the family moved to Buenos Aires, and a few years later, they relocated to Spain, where José Francisco studied at a school in Málaga starting in 1785. He was a boy from a colonial family with roots in the Americas and a European education—a combination that would shape his entire trajectory.
The beginning of his military career was forged on the other side of the Atlantic. San Martín fought in Spanish campaigns in North Africa, serving in cities like Melilla and Oran. In 1797, he was promoted to second lieutenant after actions against Napoleon Bonaparte’s French troops in the Pyrenees. His regiment took part in naval battles against the English fleet in the Mediterranean before surrendering in August 1798. In the following years, he continued serving in southern Spain, passing through Gibraltar and Cádiz, until he reached the rank of second captain of light infantry.
His greatest trial by fire in Europe came in 1808, when Napoleon’s troops invaded the Iberian Peninsula and captured King Ferdinand VII of Spain. The ensuing rebellion led to the establishment of a Governing Junta, first in Seville and later in Cádiz. San Martín was promoted by the Junta to the rank of first aide-de-camp of the Campo Mayor Volunteers Regiment. In the Battle of Bailén on July 19, 1808, he distinguished himself on the field and helped inflict the first major defeat on Napoleon’s troops—a victory that allowed the Andalusian Spanish army to retake Madrid. For his actions, he was awarded a gold medal and promoted to lieutenant colonel.
It was during his years in Europe that San Martín encountered ideas that would transform his worldview. He met Lord Macduff, a Scottish nobleman who introduced him to Masonic lodges, where debates about the independence of Spanish territories in South America circulated. In 1812, he resigned from his military career in Spain and, through the same Lord Macduff, obtained a passport to England. There, he reunited with American compatriots—including Alvear, Zapiola, Andrés Bello, and Tomás Guido—who were part of the Lautaro Lodge, a secret society founded by Francisco de Miranda to coordinate the independence of the Spanish colonies.
In March 1812, San Martín arrived on the shores of the Río de la Plata to join the forces fighting for the liberation of Spanish America. His debut on the continent was promising: in February 1813, he led the rebels to victory against Spanish troops under General José Zavala in the Battle of San Lorenzo on the Paraná River. For his performance, he was granted the rank of general by the revolutionary government. In the following years, he became the leading military force behind the independence processes of three countries. On July 28, 1821, he proclaimed the independence of Peru—an act that cemented his place in history as one of South America’s great liberators.
San Martín’s figure in the collective imagination has been constructed and reinterpreted over time. In the late 19th century, the young Argentine nation sought founding heroes to serve as anchors of national identity. In 1877, President Nicolás Avellaneda promoted celebrations for the centenary of the Liberator’s birth with an explicit goal: to repatriate his remains, which had been in a tomb in Brunoy since 1861, and turn San Martín into a symbol of national unity. The speeches of that era already presented him as a figure capable of easing the country’s internal divisions.
During the literary evening of May 25 that marked the celebrations, poems were read in his honor at the Teatro Colón, extolling his crossing of the Andes as an epic moment and his image as that of an undefeated hero. The construction of the myth was well underway.
In 1933, writer Ricardo Rojas published the biography *El Santo de la Espada: Vida de San Martín* (*The Saint of the Sword: The Life of San Martín*), which had a decisive influence on the public image of the liberator. Rojas sought to counter a humanizing vision to the militaristic celebration promoted by the dictatorial government of Agustín Pedro Justo, which had turned August 17—San Martín’s death anniversary—into a national holiday. Rojas’ intention was to highlight the human and moral aspects of the figure: his prudence, his devotion to duty, and his inner greatness. In the work, San Martín is compared to medieval knights like El Cid and Amadís de Gaula, and likened to figures such as George Washington and Simón Bolívar—though always emphasizing what set him apart from both: unlike Washington, San Martín was not a slave owner; unlike Bolívar, he did not exercise authoritarian leadership.
José de San Martín died on August 17, 1850, in Boulogne-sur-Mer, France. He had spent his final years in European exile, far from the lands he helped liberate. His legacy, however, lived on in the republics he helped found. General, statesman, Freemason, knight of ideals: San Martín embodies the kind of hero who sought no personal glory, yet whose actions defined the destiny of a continent.