After the death of Burrus and the disgrace of Seneca, Nero is free from their influence and becomes a megalomaniacal artist fascinated by Hellenism and the Orient. Tigellinus becomes Nero's counselor. His rule is highly abusive.
The Parthians invade Armenia and lay siege to Tigranocerta. The city is well-fortified and garrisoned by the Romans. The assault fails and king Vologases I retreats. Instead, he makes preparations to invade Syria.
Gnaeus Domitius Corbulo strengthens the fortifications on the Euphrates frontier. He builds a strong flotilla of ships equipped with catapults and a wooden bridge across the river, which allows him to establish a foothold on the Parthian shore.
Lucius Caesennius Paetus advances towards Tigranocerta, but due to lack of supplies he makes camp for the winter in the fortress at Rhandeia in northwestern Armenia.
Vologases I leads the Parthian army in a full-scale assault on the Euphrates. Legio X Fretensis and men of the other two legions (Legio III Gallica and Legio VI Ferrata) defend the eastern bank of the river, fighting off a desperate attack.
^Guidoboni, E.; Ferrari, G.; Tarabusi, G.; Comatri, A.; Mariotti, D.; Sgattoni, G.; Valensise, G. (2018). "62 02 05, - Pompei (NA) (Italy)". CFTI5Med, Catalogo dei Forti Terremoti in Italia (461 a.C.-1997) e nell’area Mediterranea (760 a.C.-1500) (in Italian). Istituto Nazionale di Geofisica e Vulcanologia (INGV). doi:10.6092/ingv.it-cfti5.