The history of the Indian subcontinent begins with evidence of human activity of Homo sapiens, as long as 75,000 years ago, or with earlier hominids including Homo erectus from about 500,000 years ago.
The Indus Valley Civilization, which spread and flourished in the northwestern part of the Indian subcontinent from c. 3300 to 1300 BCE in present-day Pakistan and northwest India, was the first major civilization in South Asia. A sophisticated and technologically advanced urban culture developed in the Mature Harappan period, from 2600 to 1900 BCE. This civilization collapsed at the start of the second millennium BCE and was later followed by the Iron Age Vedic Civilization, which extended over much of the Indo-Gangetic plain and which witness the rise of major polities known as the Mahajanapadas. In one of these kingdoms, Magadha, Mahavira and Gautama Buddha propagated their Shramanic philosophies during the fifth and sixth century BCE.
Most of the subcontinent was conquered by the Maurya Empire during the 4th and 3rd centuries BCE. Various parts of India were ruled by numerous Middle kingdoms for the next 1,500 years, among which the Gupta Empire stands out. This period, witnessing a Hindu religious and intellectual resurgence, is known as the classical or "Golden Age of India". During this period, aspects of Indian civilization, administration, culture, and religion (Hinduism and Buddhism) spread to much of Asia, while kingdoms in southern India had maritime business links with the Roman Empire from around 77 CE. During this period Indian cultural influence spread over many parts of Southeast Asia which led to the establishment of Indianized kingdoms in Southeast Asia.
7th-11th centuries saw the Tripartite struggle between the Pala Empire, Rashtrakuta Empire, and Gurjara Pratihara Empire centered on Kannauj. Southern India saw the rule of the Chalukya Empire, Chola Empire, Pallava Empire, Pandyan Empire, and Western Chalukya Empire. The Chola dynasty conquered southern India and successfully invaded parts of Southeast Asia and Sri Lanka in the 11th century. The early medieval period Indian mathematics influenced the development of mathematics and astronomy in the Arab world and the Hindu numerals were introduced;
(^_^)>http://en.wikipedia.org/wiki/History_of_India
KGB