Career
He entered the Infantry Academy at Toledo in 1896. His first post was in Asturias. Despite Miaja"s membership of the right-wing Unión Militar Española, in 1935 conservative minister of War, José María Gil-Robles y Quiñones, sent him to Lérida, a relatively obscure posting far from the capital, an indication that he did not have the full confidence of the government.
At the start of the military rebellion that lead to the, he was stationed in Madrid, remaining loyal to the Republican government and was appointed Minister of War.
In November 1936, he was named commander of the Junta de Defensa de Madrid (Madrid Defense Council), when the government evacuated the capital before the imminent arrival of Nationalist troops. With Vicente Rojo Lluch as chief-of-staff, he managed to halt the Nationalists at the river Manzanares at the Battle of Madrid.
As a Spanish Republican Army commander of the Central Zone, he directed the battles of the Jarama, Guadalajara and Brunete. He later supported the rebellion led by Segismundo Casado against the communist government in March 1939, heading the National Defence Council (Consejo Nacional de Defensa).
He was awarded the Laureate Plate of Madrid for his role during the Siege of Madrid.
After the end of the Civil War, he went to Gandia, where he boarded a British ship that took him into exile, first to Algeria and France, then to Mexico, where he died on 14 January 1958.