The Avarayr Plain (Armenian: Ավարայրի Դաշտ) is the location of the Battle of Avarayr in 451, and is described as being along the banks of the Ṭłmut River (Armenian: Տղմուտ գետ) (Rūd-e Zangemār, Iran), apparently the Armeno-Persian frontier at that time.[1] At the time, the Avarayr plain was part of the Armenian region of Vaspurakan. The plain is located today in northwestern Iran near the border with Nakhichevan.