in Anuradhapura, the former capital of the country. Vijayabahu married Lilavati, the daughter of Jagatipala of Kanauj, as his queen. He later married Tilokasundari, a princess from Kalinga, with the view of strengthening ties with the Kalingas. Succession war Vijayabahu's death left a disputed throne; the absolute successor Parakramabahu I was only selected after a war between the claimants to the throne. Firstly, he entered secret negotiations with Gajabahu's military chief, but these attempts to capture power failed. He then sent the army of Dakkhinadesa to capture Rajarata, but he was introduced to Manabaraha, who allied with Gajabahu. Despite the setback, he captured Rajarata. Gajabahu, his army weakened, found himself in a battle against Manabharana as well. He later declared that he had passed over Rajarata to Parakramabahu of Dakkhinadesa. Manabharana was also defeated. Parakramabahu Following the end of the Kalinga-Arya conflict, Parakramabahu I, unified the three principalities: Rohana, Malaya, and Rajarata; declaring the islandwide Dakkhinadesa, he formed the Polonnaruwa kingdom in the latter. His reign saw the expansion of the kingdom, leading raids and large-scale invasions against his opponents. He launched an invasion against the kings of Ramanna (currently lower Burma) due to their acts of hostility, such as the kidnapping of a princess by Narathu's son Narapatisithu. In this invasion, he captured the Burmese city Bassein. After Parakramabahu Following the death of Parakramabahu, Vijayabahu II ascended the throne. He called Nissanka Malla to visit the country and take the throne. Vijayabahu II was, however, killed by the invader Mahinda VI. Nissanka Malla assassinated Mahinda VI and justified his killing by claiming he was the rightful ancestor of Vijaya Singha. Kingdom Agriculture Starting from the era of Parakramabahu I, there was great interest in irrigation. He ordered: Mass tanks were built for this purpose. Some of his notable works are the Parakrama Samudra and the Giritale tank. These works surpassed what existed during the Anuradhapura period. Previously built dams were largely renovated during this period. Demographics The Sinhalese accounted for the majority, and the Sinhalese language was the common language. Settlements from Cambodia are recorded, the Khmer settled in an area called Kambojavâsaĺa. The Khmer script was used to write Pali texts such as the Khmer script version of the Mahavamsa. Trade Most trade was carried out through the main seaports of the principality, Kalpitiya, Halaavatha (Chilaw) and Colombo. Coinage The coins, which were mostly made of copper, were