[1] Several ancient cities, including Tambapanni, Upatissa Nuwara, Anuradhapura and Polonnaruwa, were established as capitals within the area by successive rulers.According to Mahavamsa, various groups came from India in the period between Prince Vijaya and King Pandukabhaya's reign, frequently settling along the Malvathu Oya.Tanks built during the Anuradhapura era (Giant's, Padaviya, Minneriya, Kantale, Mahavillachchiya, Thabbowa, Kala) are proof of the early settlements in Rajarata area.Because of the rising threat, Pandyan troops established an administration centre in Jaffna Peninsula which was more secure and isolated by the impenetrable Vanni forest.The last Pandyan ruler of Madurai, was defeated and expelled in 1323 by Malik Kafur, the army general of the Muslim empire Delhi Sultanate.