The Romans, concerned by the threat from…

The Romans, concerned by the threat from Tigranes' expanding empire, dispatch an army against him, Mithridates having taken refuge with his son-in-law in the new Armenian imperial capital of Tigranocerta in the Arzenene district.

Lucullus leads a campaign into Armenia against Tigranes and begins a siege of Tigranocerta.

Tigranes returns from mopping up a Seleucid rebellion in Syria with an experienced army that Lucullus nonetheless annihilates in the fierce Battle of Tigranocerta, fought on the same (pre-Julian) calendar date as the Roman disaster at Arausio thirty-six years earlier, the day before the Nones of October according to the reckoning of the time (or October 6), which is Julian October 16, 69 BCE.

Lucullus takes the rich Armenian capital; …