In other words, after the downfall[8] of the ancient city of Arrajan due to a series of devastating earthquakes,[9] survivors unsurprisingly had to live in tents for some time.

History of Behbahan is indispensably intertwined with the ancient Iranian city of Argan (Arrajan) from Elamite era (3200–539 BC).

[32] In 502-503,[33] the king launched a campaign as part of the Anastasian War against northern Roman Mesopotamia,[32] and deported 80,000 prisoners from Amida, Theodosiopolis, and possibly Martyropolis to Pars, some of whom are thought to have helped rebuild the city of Arrajan.

[35] Through time, Arrajan experienced ups and downs of the history and managed to survive even the Arab Muslim invasion albeit at the cost of almost all residents having to convert from Zoroasterianism to Islam.

[2] Behbahan has a hot semi-arid climate (Köppen: BSh), characterised by sweltering and rainless summers and pleasant winters with occasional heavy rainfall.