Antoninus and Caracala in the September Severace Podcasts

Getter was promoted to augustus in two o nine, about the same time as the british campaign started. And while antoninus goes campaigning with septimius severus, getter is left in charge the civilian administration in britain. So he's definitely trying to prepare both sons to take the throne after his death. A case at this point we should call antoninus by his better, well known name - caracala.