The Tamil prasaśti of Virarajendra Chola records a naval invasion of Kadaram (modern Kedah in Malaysia) by the Cholas. Sources assert that the expedition was undertaken to help a Kadaram prince who had approached Virarajendra Chola for assistance in procuring the throne. The kingdom of Kadaram is believed to be the same as the Sri Vijaya empire.
References
Chola invasion of Kadaram Wikipedia(Text) CC BY-SA