In the Morocco campaigns of his last years, especially at the capture of Alcazar the Little (1458), he restored the military fame which he had founded at Ceuta and compromised at Tangier, and which brought him invitations from the pope, the emperor and the kings of Castile and England, to take command of their armies.
Though he waged war all through his reign he very rarely appeared in the field, but directed the generals, whom he never trusted, from his "lair" in the fortified palace, the Alcazar of Seville.
Alcazar is sometimes identified with the Roman Alce, captured by Tiberius Sempronius Gracchus in 180 B.C. It derives its existing name from its medieval Moorish castle (al-kasr), which was afterwards garrisoned by the knights of St John.
Avila also possesses an old Moorish castle (alcazar) used as barracks, a foundling hospital, infirmary, military academy, and training schools for teachers of both sexes.