Bactria-Margiana-India
Bactria Margiana Archaeological Complex (BMAC) is a collective term referring to the combined area of archaeological discoveries that point to the existence of a hitherto unknown uniform bronze age civilization of central Asia.
The complex mainly stretches within a large continuous zone between southern Turkmenistan and Northern Afghanistan, and smaller adjacent areas of Iran, Uzbekistan and Tajikistan.
The exact identity of the BMAC culture has yet to be fully identified due to the lack of written evidence at the sites excavated up to know. However the material evidence is strongly indicative of proto Indo-Iranian and proto-Zoroastrian practices, which if true offers a unique testimony of what the common culture of the original indo-Iranians was before they split off into the Indic and Iranian branches.
Black Sands documentary 