Large cities such as Harappa and Mohenjo-daro developed in the Indus River Valley. (apr 30, 2500 BC – jul 27, 1600 BC)
Description:
https://docs.google.com/document/d/1LCtRSeq-B9x6itGlo47ZdLz4hv8zqvFdmGSF_nhgyQI/edit?usp=sharingAdded to timeline:
Date:
apr 30, 2500 BC
jul 27, 1600 BC
~ 900 years