Baktra

Bactria, or Bactriana, was an ancient region in Central Asia. Bactria proper was north of the Hindu Kush mountain range and south of the Oxus river, covering Afghanistan. More broadly, Bactria was the area which was located north of the Hindu Kush, west of the Pamirs and south of the Tian Shan, covering modern-day Tajikistan and Uzbekistan as well, with the Amu Darya flowing west through the centre.

Called "beautiful Bactria, crowned with flags" by the Avesta, the region is one of the sixteen perfect Iranian lands that the supreme deity Ahura Mazda had created. One of the early centres of Zoroastrianism and capital of the legendary Kayanian kings of Iran, Bactria is mentioned in the Behistun Inscription of Darius the Great as one of the satrapies of the Achaemenid Empire; it was a special satrapy and was ruled by a crown prince or an intended heir.