| In the Indus valley area now known as Pakistan, an advanced Bronze Age culture rose up about 2500 bc and lasted for 1000 years. Scholars do not know how it began or whether its people were related to those who now occupy Southwest Asia. Nomadic tribes called Aryans invaded the Indus River valley, probably from the region north of the Caspian Sea, in 1500 bc. The Aryan culture became dominant in the area, eclipsing that of its predecessors. |