"Mathiraiyum Eezhamum konda KO-PARAKESARI is Parantaka I ..
Mathiraiyum Eezhamum konda KO -RAJAKESARI is Sundara ".. (f/o RRC).
But historically the war by Parantaka I was formidable in comparison with that of Sundara !
These details are avl in KAN - The Colas & in Cholar Baralaru by Sadhasiva Pandarathar. Maa. Rasamamanickanar also wrote Cholar Varalaru - apart from his magnum opus Pallavar Varalaru.
f/o RRC)... " we can easily understand that war took place in his hay-days and not in the fag-end.
PS storyline is just preceding Uthama's ascending the throne.
Thus, Kalki took the liberty re time-frame and methodologies of Lankan war ...
Subject which triggered the discussion was "whether RRC" could have taken part in that war ?
Unlikely .. because he was still Arumozhi.. and no inscriptional support or any literary evidence.