The Aryans begin their migration to the Indus Valley
More castes and subcastes are added to India's social organization system
The Aryans move into the area of the Ganges Valley, expanding their migration into India
Hinduism begins to take shape
By this time India is cleared, settled, and agriculturally controlled
Alexander the Great campaigns through the Indus Valley, bringing Greek culture into India
327 B.C.E. - 325 B.C.E.