The document provides information on the Chola dynasty of South India, which rose to prominence again in the 9th century CE. It discusses the antiquity of the Cholas dating back to the Sangam period. It details the imperial campaigns of prominent Chola kings like Rajaraja I and his son Rajendra I that expanded the empire through conquests of territories including Sri Lanka, Kerala, parts of Karnataka and Andhra Pradesh. The Cholas emerged as a powerful military, economic and cultural force in South and Southeast Asia during this time under these rulers.