<P> Most of the subcontinent was conquered by the Maurya Empire during the 4th and 3rd centuries BCE . From the 3rd century BCE onwards Prakrit and Pali literature in the north and the Tamil Sangam literature in southern India started to flourish . Wootz steel originated in south India in the 3rd century BCE and was exported to foreign countries . During the Classical period, various parts of India were ruled by numerous dynasties 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 civilisation, administration, culture, and religion (Hinduism and Buddhism) spread to much of Asia, while kingdoms in southern India had maritime business links with the Middle East and the Mediterranean . Indian cultural influence spread over many parts of Southeast Asia which led to the establishment of Indianised kingdoms in Southeast Asia (Greater India). </P> <P> The most significant event between the 7th and 11th century was the Tripartite struggle centred on Kannauj that lasted for more than two centuries between the Pala Empire, Rashtrakuta Empire, and Gurjara Pratihara Empire . Southern India saw the rise of multiple imperial powers from the middle of the fifth century, most notable being the Chalukya, Chola, Pallava, Chera, Pandyan, and Western Chalukya Empires . The Chola dynasty conquered southern India and successfully invaded parts of Southeast Asia, Sri Lanka, Maldives and Bengal 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 . </P> <P> Muslim rule started in parts of north India in the 13th century when the Delhi Sultanate was founded in 1206 CE by Central Asian Turks; though earlier Muslim conquests made limited inroads into modern Afghanistan and Pakistan as early as the 8th century . The Delhi Sultanate ruled the major part of northern India in the early 14th century, but declined in the late 14th century . This period also saw the emergence of several powerful Hindu states, notably Vijayanagara, Gajapati, Ahom, as well as Rajput states, such as Mewar . The 15th century saw the advent of Sikhism . The early modern period began in the 16th century, when the Mughal Empire conquered most of the Indian subcontinent . The Mughal Empire suffered a gradual decline in the early 18th century, which provided opportunities for the Maratha Empire, Sikh Empire and Mysore Kingdom to exercise control over large areas of the subcontinent . </P> <P> From the late 18th century to the mid-19th century, large areas of India were annexed by the British East India Company of the British Empire . Dissatisfaction with Company rule led to the Indian Rebellion of 1857, after which the British provinces of India were directly administered by the British Crown and witnessed a period of rapid development of infrastructure, economic decline and major famines . During the first half of the 20th century, a nationwide struggle for independence was launched with the leading party involved being the Indian National Congress which was later joined by other organisations . The subcontinent gained independence from the United Kingdom in 1947, after the British provinces were partitioned into the dominions of India and Pakistan and the princely states all acceded to one of the new states . </P>

Who invaded the indian subcontinent around 1500 bce
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