 In 479 Marcian tried to overthrow Zeno.With the help of his brothers Procopius Anthemius and Romulus, he gathered troops composed of both citizens and foreigners in the house of a Caesarius, south of the Forum of Theodosius in Constantinople, and from there they marched simultaneously on the Imperial palace and on the house of Illus, an Isaurian general who supported Zeno.The Emperor almost fell into the hands of the rebels, who, during the day, overwhelmed the imperial troops, who were attacked also by the citizens from the roofs of their houses.