The Medes, and with them the Sagarthians, were to revolt against Darius I of Persia in 522 BC, but this revolt was firmly put down by the army which Darius sent out under the leadership of General Takhmaspada the following year. The events are depicted in the Behistun Inscription which stands today in the mountains of Iran's Kermanshah province. Ever the buffer zone between the two great empires of Byzantium and Persia, the plains of 10 Km to the west of Erbil were to witness the Battle of Gaugemela between Alexander the Great and Darius III of Persia in 331 BC. Vanquished, Darius managed to flee to Erbil, which is why the battle is still sometimes referred to - rather inaccurately - as the Battle of Erbil. Erbil went on to be the seat of rule of the Adiabene Kingdom in the first century AD, largely located to the north west in the region of modern day Diyarbakir in Turkey. It is remembered in Jewish traditions for the notable conversion of its Queen, Helena of Adiabene, to Judaism before she moved on to Jerusalem. Early Christianity was also to flourish in Erbil with a bishop established in the town as early as AD 100 with a community of followers thought to be converts from Judaism.