Definition of Indus valley civilisation

The Indus Valley Civilization (c. 3000–1500 BCE, flourished 2600–1900 BCE), abbreviated IVC, was an ancient  civilization that flourished in the Indus and Ghaggar-Hakra river valleys primarily in what is now Pakistan and western India, extending westward into Balochistan. The mature phase of this civilization is known as the Harappan Civilization, after the first of its cities to be excavated, Harappa. Excavation of IVC sites has been ongoing since the 1920s.