The Avarayr Plain is the location of the Battle of Avarayr in 451, and is described as being along the banks of the Ṭłmut River (Rūd-e Zangemār, Iran

Iran

Iran , officially the Islamic Republic of Iran , is a country in Southern and Western Asia. The name "Iran" has been in use natively since the Sassanian era and came into use internationally in 1935, before which the country was known to the Western world as Persia...

), apparently the Armeno-Persian frontier at that time. At the time, the Avarayr plain was part of the Armenian region of Vaspurakan

Vaspurakan

Vaspurakan was the first and biggest province of Greater Armenia, which later became an independent kingdom during the Middle Ages, centered around Lake Van...

. The plain is located today in northwestern Iran near the border with Nakhichevan

Nakhichevan

The Nakhchivan Autonomous Republic is a landlocked exclave of Azerbaijan. The region covers 5,363 km² and borders Armenia to the east and north, Iran to the south and west, and Turkey to the northwest...

.