Three kingdoms that existed during the Sangam Age were Pandyas, Cheras and Cholas.
Achievements of Senguttuvan — Cheran Senguttuvan was the most popular king of the Sangam Cheras. The Sangam works, Padirruppattu and Ahananuru provide a lot of information about him. The Tamil Epic Silappadikaram also tells about his military achievements. Senguttuvan led an expedition up to the Himalayas. He crossed the river Ganges and defeated his enemies. He reached the Himalayas and hoisted the Chera flag. He brought stones from there and built a temple in memory of Kannagi.
Achievements of Karikalan — The most popular among the Sangam Cholas was Karikalan. Both the Sangam works, Pattinappalai and Porunaruatruppadi give information about Karikalan. Even in his young age, he proved his extraordinary ability of settling the disputes in his kingdom. He was a great warrior. He defeated the Chera and Pandya kings at Venni. In another battle Karikalan defeated a confederacy of nine princes. He extended his kingdom beyond Kanchipuram in the North. Karikalan had also become popular for the development activities in his kingdom. He had encouraged the growth of agriculture as well as commerce. He had built the dam called Kallanai across the river Kavery to tame that river and the water was used for irrigation. Karikalan had also fortified the port-city Kaveripoompattinam or Puhar and made it as his capital. It flourished as a great emporium of trade. Merchants from foreign countries visited Puhar. Karikalan was generous towards Tamil poets and patronised them.
