For further localization, the same imperial purple passage contrasts the civil wars of the Macedonians (Diadochi wars) due to failure to obtain a stable emperor, with an incident of the Roman Empire in which the risk of civil war was avoided by the appointment of a new emperor in a single night. Not very many incidents fit the description. Baynham summarizes the argument of Julius Nützell that the crisis might be the night of January 24/25, 41 AD, following the assassination of Caligula on that day. The Senate met on an emergency basis to debate whether the Roman Republic should be restored. The Praetorian Guard forced its way in to insist on the appointment of Caligula's uncle, Claudius. His reign concentrated on the restoration of the rule of law. A lawyer, he issued up to 20 imperial edicts per day, re-establishing the Pax Romana. If this argument is correct, Curtius' work must be dated to after 41 AD.