[1] The emperor Nero, highly fearful of Corbulo's reputation, ordered him to commit suicide, which the general carried out faithfully, exclaiming "Axios", meaning "I am worthy", and fell on his own sword.
After Caligula's assassination, Corbulo's career came to a halt until, in AD 47, the new Emperor Claudius made him commander of the armies in Germania Inferior, with a base camp in Colonia (Cologne).
It ran largely parallel to the modern-day Vliet canal, which connects the modern towns of Leiden (ancient Matilo) and Voorburg (Forum Hadriani).
[5] Upon reaching lower Germania, Corbulo employed both the army and naval squadrons of the fleet patrolling the Rhine and the North Sea, eventually expelling the Chauci away from the Roman Provinces and instituting a rigorous training program in order to ensure maximum effectiveness of his legions.
Artaxata and Tigranocerta were captured by his legions (III Gallica, VI Ferrata, and X Fretensis), and Tigranes, who had been brought up in Rome and was an obedient servant of the government, was installed as king of Armenia.
Paetus, a weak and incapable commander who "despised the fame acquired by Corbulo", suffered a severe defeat at Rhandeia in AD 62, where he was surrounded and forced to capitulate to the Parthians and evacuated to Armenia.
In AD 67 disturbances broke out in Judaea and Nero, ordering Vespasian to take command of the Roman forces, summoned Corbulo, as well as two brothers who were the governors of Upper and Lower Germania, to Greece.