The Grand anicut was built after his conquest over the Singalese kingdom and he used Singalese war prisoners for the hard task of moving stones from the mountains to the river bed of the Kaveri.[citation needed] The Pattinappalai also describes the destruction caused by Karikala’s armies in the territories of his enemies and adds that as the result of these conflicts, the "Northerners and Westerners were depressed… and his flushed look of anger caused the Pandya’s strength to give way…".