during his reign, the visigoths fought the byzantines. however, isidore of seville is dismissive of witteric's accomplishments, writing that "although he frequently fought battles against the roman soldiers, he did not win any adequate glory except for capturing some soldiers at sagunto with the help of his generals." the campaign against sagunto probably took place in 605. it was probably during his reign, as well, that bigastrum (near cartago nova) was taken, as its bishop appears in a council of toledo in 610.