And as a side, bonus question: what was life like under the Vandal and Ostrogothic kingdoms?
After the defeat of the Vandals, most of the survivors were bundled up into five regiments of cavalry, the 'Vandali Iustiniani', and shipped off to the Middle East.
Source
History of the Later Roman Empire: From the Death of Theodosius I to the Death of Justinian (Volume 1) – October 27, 2011. p.139.