Balasagan

Balāsagān (an Iranian toponym meaning "country of Balas"; Armenian: Bałasakan, the inhabitants known as Bałasičkʻ, Arabic: Balāsajān/Balāšajān), also known as Bazgan, was a region located in the area of the Kura and Aras rivers, adjacent to the Caspian Sea.

[1] During the reign of Yazdegerd II (r. 438–457), the king of Balasagan, Heran, took part in the Sasanian efforts to crush the 450–451 Armenian rebellion of Vardan Mamikonian.

[1][11] Balasagan was conquered in c. 645 by an Arab army led by Salman ibn Rabi'a, who forced some Kurds of the region to pay jizya (poll tax).

Balasagan notably appears in the work of the 10th-century Arab traveller Abu Dulaf al-Yanbu'i, who in his al-Risala al-thania, reports of his journey in the region.

In Middle Persian, the term yazd simply means god, which demonstrates influence from Zoroastrianism, which must have taken place in the Sasanian era.