Sri Lanka's irrigation system was extensively expanded during the reign of Parākramabāhu the Great (1153–1186). This period is considered as a time when Sri Lanka was at the height of its power. He built 1,470 reservoirs – the highest number by any ruler in Sri Lanka's history – repaired 165 dams, 3,910 canals, 163 major reservoirs, and 2,376 mini-reservoirs. His most famous construction is the Parakrama Samudra, the largest irrigation project of medieval Sri Lanka. Parākramabāhu's reign is memorable for two major campaigns – in the south of India as part of a Pandyan war of succession, and a punitive strike against the kings of Ramanna (Burma) for various perceived insults to Sri Lanka.