A staunch pacifist, he initially declined to defend the stronghold -- a principled refusal for which was put on latrine duty. When the situation worsened, however, he agreed to aid in the Alcazar's defense but promised himself not to kill in hatred.
Assigned the task of loading a heavy machine gun, he would give the signal to fire with these words: "Tirad -- pero sin odio!" (Fire -- without hatred!)
[Nine days before the Alcazar was saved by the Nationalist forces, Antonio's arm, shattered by a grenade, had to be amputated (without anesthetic). He was carried to his father's home, where he died two months later.]