Battle of Gaugamela
During the victorious period of Alexander the Great, and following the decline of the Achaemenid Empire, the Orontid rulers of the Armenian Satrapy achieved independence as a result of the Battle of Gaugamela in 331 BC, founding the Kingdom of Armenia. With the establishment of new cities such as Armavir, Zarehavan, Bagaran and Yervandashat, the importance of Erebuni had gradually declined.