 Hasdrubal and Mago went to Hasdrubal Barca by forced marches, thinking that their joint forces would bring the war to a close.Gnaeus realised that his brother had been defeated and withdrew, covering a great distance in one night and eluding the enemy.When at dawn the latter realised that he had gone, the Numidian cavalry pursued at full speed, caught up with him and forced him to defend himself while still trying to advance so as not to be caught by the infantry.