According to the "Chronicle of 754", Roderic immediately upon securing his throne gathered a force to oppose the Arabs and Berbers ("Mauri", whence the word "Moors"), who were raiding in the south of the Iberian peninsula and had destroyed many towns under Tariq ibn Ziyad and other Muslim generals. While later Arabic sources make the conquest of Hispania a singular event undertaken at the orders of the governor Musa ibn Nosseyr of Ifriqiya, according to the "Chronicle", which was written much nearer in date to the actual events, the Arabs began disorganised raids and undertook to conquer the peninsula only with the fortuitous death of Roderic and the collapse of the Visigothic nobility.