The Indus Valley Civilization, thriving between 3300-1300 BCE, was a significant Bronze Age culture centered in today's Pakistan and Northwest India, known for its advanced urban planning and sanitation systems. Major archaeological sites such as Mohenjo-Daro and Harappa reveal sophisticated town layouts, substantial public works like the Great Bath and granaries, and artistic achievements in sculpture and pottery. The civilization's timeline includes early agricultural settlements around 4000 BCE, with notable urbanization occurring around 3000 BCE, and it eventually faced migration pressures from nomadic groups around 1500 BCE.