Under Chandragupta I (320-335), empire was revived in the north. Like Chandragupta Maurya, he first conquered Magadha, set up his capital where the Mauryan capital had stood (Patna), and from this base consolidated a kingdom over the eastern portion of northern India. In addition, Chandragupta revived many of Asoka's principles of government. It was his son, however, Samudragupta (335-376), and later his grandson, Chandragupta II (376-415), who extended the kingdom into an empire over the whole of the north and the western Deccan. Chandragupta II was the greatest of the Gupta kings; called Vikramaditya ("The Sun of Power"), he presided over the greatest cultural age in India. From Pataliputra, their capital, they sought to retain political preeminence as much by pragmatism and judicious marriage alliances as by military strength. The greatest writer of the time was Kalidasa. Poetry in the Gupta age tended towards a few genres: religious and meditative poetry, lyric poetry, narrative histories (the most popular of the secular literatures), and drama. Kalidasa excelled at lyric poetry, but he is best known for his dramas. The Indian numeral system--sometimes erroneously attributed to the Arabs, who took it from India to Europe where it replaced the Roman system--and the decimal system are Indian inventions of this period. Aryabhatta's expositions on astronomy in 499 A.D, moreover, gave calculations of the solar year and the shape and movement of astral bodies with remarkable accuracy. In medicine, Charaka and Sushruta wrote about a fully evolved system. Indian physicians excelled in pharmacopoeia, caesarean section, bone setting, and skin grafting.
The Guptas fell prey, however, to a wave of migrations by the Huns, a people who originally lived north of China. Beginning in the 400's, the Huns began to put pressure on the Guptas. In 480 AD they conquered the Guptas and took over northern India. Western India was overrun by 500 A.D., and the last of the Gupta kings, presiding over a vastly diminished kingdom, perished in 550 A.D. A strange thing happened to the Huns in India as well as in Europe. Over the decades they gradually assimilated into the indigenous population and their state weakened.
