Complex sentence: The Pandya, Chola and Chera dynasties of the classical age rule and flourish in the ancient Tamil country.In the 3rd century BC the Xiong Nu were at the height of their power in Mongolia.
Split into simpler sentences: The Pandya, Chola and Chera dynasties of the classical age rule and flourish in the ancient Tamil country. The Xiong Nu were at the height of their power in Mongolia.