Died: June 8, 1873
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He was born in Puerto Príncipe, city of Camagüey. His parents were Luis Díaz and María de la Concepción Zayas Bazán.
He completed his primary education in his native city; he then went to the United States. He enrolled in the Dental College of Baltimore, whose dental surgeon degree he legalized before the Spanish consul at the end of October 1862; he was examined at the University of La Habana on October 31 of that same year; the tribunal was made up of dean Horstman and Morillos; he was approved and was issued the certificate that authorized him to practice his profession. He worked as a dental surgeon in Camagüey.
He began to practice his profession in his native city, while at the same time dedicating himself to work in the Revolutionary Committee; later he moved to Manzanillo, where he associated with Rosendo Arteaga, who was married to a sister of Fernando Figueredo, and was a patriot in every sense of the word. There he established a dental office, while dedicating himself to separatist propaganda in the locality.
When the revolutionary activities of 1868 intensified, he was the link that united the conspirators of Oriente and Camagüey, since in that region the documents of the Marquis of Santa Lucía were brought, related to the armed movement that the patriots were planning.
On November 4, 1868, together with the brothers Augusto and Napoleón Arango, he was present at the glorious uprising of Camagüey. He attended the Assembly of Minas on November 26, where he voted for war. He participated in several battles, such as that of Bonilla against Valmaseda and Rompe.
For his bravery and activity, when the Constitution of Guáimaro was promulgated, he was promoted to cavalry commander. On January 2 he fought again against the Spanish, inflicting great punishment upon them.
On July 22, 1869, under the orders of general Ignacio Agramonte, he attended the attack and bombardment of the city of Camagüey, an action in which Ignacio Agramonte himself made it known that "The conduct of Commander Díaz was worthy of praise, and that his valor had bordered on recklessness."
He participated in the attack on Tunas de Zaza and in the battle of Arroyo Piedra; he was promoted to lieutenant colonel and had not yet worn the stars when he faced a superior force at the pasture "La Luz," causing it to retreat and pursuing it to the entrance of the city of Camagüey.
He attended the battles of Sebastopol, Najasa, Santa Rosa, La Horqueta, Finca Benera, El Salado and Jacinto, where he was promoted to the rank of colonel on the battlefield itself. With over 200 rifles captured from the enemy in this action and in that of El Salado, he was commissioned to organize the celebrated Jacinto Regiment, whose command was conferred upon him by the notable Ignacio Agramonte. Said regiment soon achieved fame for its discipline, in a time of true trial. At the head of this regiment, he took part in countless battles, skirmishes and shootouts, by which he rapidly acquired training and esprit de corps.
On June 8, 1873, while making an inspection tour at 5 o'clock in the afternoon, he was in the savanna of Jimaguayú with a small escort, mounted on unbroken colts for the most part, when he was surprised and quickly surrounded by Spanish troops, far superior in number and better mounted. Along with Colonel Luis Magín, Colonel Maximiliano Ramos and Captain Fabián Mederos fell. His corpse was collected by the Spanish and taken to Guáimaro, where they hanged him in the Public Square for identification; he was buried in the cemetery of that town.
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