"Martín Fierro" is an epic poem written by Argentine author José Hernández in the 19th century. It tells the story of a gaucho named Martín Fierro, who is forcibly conscripted into the army and faces the injustices of society. The poem highlights themes of freedom, oppression, and the struggles of rural life in Argentina. The work is divided into two parts: the first part, "El gaucho Martín Fierro," introduces the protagonist and his hardships, while the second part, "La vuelta de Martín Fierro," follows his return home and the impact of his experiences. "Martín Fierro" is considered a foundational text of Argentine literature and a symbol of national identity.