 Complete the following phrase:  The pro-Roman Vandal king Hilderic was deposed by his cousin Gelimer in 530. The ensuing insurrections in Sardinia and Tripolitania provided Justinian with a pretext to intervene. He appointed Belisarius to lead the invasion against the Vandal Kingdom early in 533. Theodorics daughter, Amalasuntha, who ruled the Ostrogothic Kingdom in Italy as regent for her son Athalaric, allowed the Roman expeditionary forces to use the port of Syracuse during the campaign. In a year, Belisarius defeated the Vandals with the native populations support and conquered their kingdom. The pacification of the reconquered northern African territories lasted for years because of riots by unruly Berber tribes and their cooperations with rebellious Roman troops. In Italy, Athalaric died and Amalasunthas cousin Theodahad had her assassinated in 535. An unidentified natural catastrophe, likely dust from a major vulcanic eruption, 