By July 22, the Republicans controlled most of Toledo and sought the surrender of the Alcázar by artillery bombardment. For the duration of the siege, the Nationalists engaged in a passive defense, only returning fire when an attack was imminent.
Colonel Moscardó was called on the telephone by the chief of the Worker's Militia, Commissar Candido Cabello, on the morning of July 23 in Toledo and told that if the Alcázar were not surrendered within ten minutes, Moscardó's 16-year-old son, Luis, who had been captured earlier in the day, would be executed. Colonel Moscardó asked to speak to his son and his son asked what he should do. “Commend your soul to God," he told his son, "and die like a patriot, shouting,‘¡Viva Cristo Rey!' and ‘¡Viva España!’ The Alcázar does not surrender.” "That," answered his son, "I can do." Luis was immediately shot, contrary to the rumor that he was not in fact shot until a month later "in reprisal for an air raid".