How did the aryans invasion affect civilization in the Indus River Valley?

One theory suggested that a nomadic, Indo-European tribe, called the Aryans, invaded and conquered the Indus Valley Civilization. ... The eastward shift of monsoons may have reduced the water supply, forcing the Harappans of the Indus River Valley to migrate and establish smaller villages and isolated farms.

Explanation:

lee and grant, both of whom held the highest rank in their respective armies, had known each other slightly during the mexican-american war (1846-48) and began their dialogue by exchanging awkward personal inquiries. characteristically, grant had arrived in his mud-splattered field uniform while lee had turned out in full dress attire, complete with sash and sword.

explanation: