This document provides information about the Indus Valley Civilization, one of the earliest civilizations in South Asia. It flourished around 4000-1000 BCE along the Indus River valley. Key traits included the development of large urban settlements like Mohenjo-Daro and Harappa, advanced sanitation systems, and extensive trade networks connecting it to other regions. The civilization declined around 1900 BCE for currently unknown reasons, but its roots stretch back even earlier and influenced later cultures in the region.