In said war, Díaz fought under the orders of generals Salomé Hernández, Francisco Villamil, Carlos Roloff, Miguel Jerónimo Gutiérrez, Honorato del Castillo, and the brothers Federico and Adolfo Fernández Cavada.

The Zanjón Pact, which ended that war, recognized the freedom of the slaves who had fought in the Mambí Army, which benefited Commander Díaz Molina.

On February 24, 1895, the Cuban War of Independence broke out and Lieutenant Colonel Pedro Díaz Molina took up arms on June 5 of that year and, shortly after, was appointed Chief of the "Remedies Brigade".

[3] Díaz Molina joined Generals Máximo Gómez and Antonio Maceo during the Invasion from East to West in Cuba and took part in several of their combats, particularly in Calimete and Coliseo.

Pedro Diaz ended the war in 1898, with the rank of Major General, along with his troops in his camp near the city of Pinar de Rio.