The known history of India begins with the Indus Valley Civilization, which spread and flourished in the north-western part of the Indian subcontinent, from c. 3300 to 1300 BCE. Its Mature Harappan period lasted from 2600-1900 BCE. This Bronze Age civilization collapsed at the beginning of the second millennium BCE and was followed by the Iron Age Vedic period, which extended over much of the Indo-Gangetic plains and which witnessed the rise of major kingdoms known as the Mahajanapadas. In one of these kingdoms Magadha, Mahavira and Gautama Buddha were born in the 6th century BCE, who propagated their Shramanic philosophies among the masses.
Later, successive empires and kingdoms ruled the region and enriched its culture - from the Achaemenid Persian empire around 543 BCE, to Alexander the Great in 326 BCE. The Indo-Greek Kingdom, founded by Demetrius of Bactria, included Gandhara and Punjab from 184 BCE; it reached its greatest extent under Menander, establishing the Greco-Buddhist period with advances in trade and culture.
History of India - Wikipedia, the free encyclopedia 
