Analysis of information sources in references of the Wikipedia article "Bactria" in English language version.
Bactria, ancient country lying between the mountains of the Hindu Kush and the Amu Darya (ancient Oxus River) in what is now part of Afghanistan, Uzbekistan, and Tajikistan.
After annexation to the Persian empire by Cyrus in the sixth century, Bactria together with Margiana formed the Twelfth Satrapy.