Bactrian Composite Stone Idol. Afghanistan/Turkmenistan Circa: 2500 BCE to 1800 BCE. Bactria is the old Greek name for northern Afghanistan and the northeast corner of Iran, while Margiana is further north, in what is today Turkmenistan and Uzbekistan. Through the region runs the Amu Dar’ya River, which was known in Greek history as the Oxus River. Western scholars subsequently used that landmark to dub the newly found culture the Oxus civilization