The Inner Asian Mountain Corridor (IAMC) was an ancient exchange route ranging from the Altai Mountains in Siberia to the Hindu Kush (present-day Afghanistan and northern Pakistan), which took shape in the 3rd millennium BCE.[1][2][3][4][5] The expansion of the Indo-European Andronovo culture towards the Bactria-Margiana Culture in the second millennium BCE took place along the IAMC, giving way to the Indo-Aryan migration into South Asia.[6]