Arran, also known as Aran, was a geographical name used in ancient and medieval times to signify a historically-Iranian region which lay within the triangle of land, lowland in the east and mountainous in the west, formed by the junction of the Kura and Aras rivers, including the highland and lowland Karabakh, Mil plain and parts of the Mughan plain. In pre-Islamic times, it corresponded roughly to the territory of the modern-day Republic of Azerbaijan. The term is the Middle Persian equivalent to the Greco-Roman Albania. It was known as Aghvania, Alvan-k in Armenian, and Al-ran in Arabic.

Azerbaijan, officially the Republic of Azerbaijan, is a transcontinental country located at the boundary of Eastern Europe and West Asia. It is a part of the South Caucasus region and is bounded by the Caspian Sea to the east, Russia's republic of Dagestan to the north, Georgia to the northwest, Armenia and Turkey to the west, and Iran to the south. Baku is the capital and largest city.