 The emergence of two large armies of the enemy effectively ended the siege after forty days.These were the forces of Hasdrubal Gisgo and his son-in-law Syphax, who apparently did not hesitate anymore.Their numerical superiority (according to the tradition passed by ancient authors such as Polybius and Livy, the army of Hasdrubal amounted to more than 30,000 and that of Syphax was twice as many, but these numbers are considered as exaggerated by modern researchers) forced Scipio to retreat to a promontory not far from Utica, which was later called Castra Cornelia.