Bernal Díaz del Castillo (c. 1496 – January 11, 1584) was a Spanish conquistador, who participated as a soldier in the conquest of Mexico under Hernán Cortés and late in his life wrote an account of the events. As an experienced soldier of fortune, he had already participated in expeditions to Tierra Firme, Cuba, and to Yucatán before joining Cortés. In his later years he was an encomendero and governor in Guatemala where he wrote his memoirs called The True History of the Conquest of New Spain. He began his account of the conquest almost thirty years after the events and later revised and expanded it in response to the biography published by Cortes's chaplain Francisco López de Gómara, which he considered to be largely inaccurate in that it did not give due recognition to the efforts and sacrifices of others in the Spanish expedition.