The dating of glass in the Indus Valley and northern India, between 1900 and 1700 BC suggests that this industry was becoming common in all three reg… - Jonathan Mark Kenoyer

There is evidence for the intensification of subsistence practice, multicropping and the adoption of new forms of transportation (camel and horse). These changes were made by the indigenous inhabitants, and were not the result of new people streaming into the re- gion. The horse and camel would indicate connections with Central Asia. The cultiva- tion of rice would connect with cither the Late Harappan in the Ganga-Yamuna region or Gujarat. (Kenoyer 1995, 227;)

Although the overall socioeconomic organization changed, continuities in technology, subsistence practices, settlement organization, and some regional symbols show that the indigenous population was not displaced by invading hordes of Indo-Aryan speaking people. For many years, the ‘invasions’ or ‘migrations’ of these Indo-Aryan-speaking Vedic/Aryan tribes explained the decline of the Indus civilization and the sudden rise of urbanization in the Ganga-Yamuna valley. This was based on simplistic models of culture change and an uncritical reading of Vedic texts. Current evidence does not support a pre- or proto-historic Indo-Aryan invasion of southern Asia. Instead, there was an overlap between Late Harappan and post-Harappan communities, with no biological evidence for major new populations.

Episodes of aggression and conflict probably occurred, but armed conflict was not a major activity, nor does the integration of the Indus Valley seem to have been achieved through military coercion.