According to the Ceylon chronicles he was placed on the throne by the people rebelling against the previous kings. He was the King's Amatya or Minister. But he had gained respect under the weak successors of Ajatsatru and probably became the ruler in 413 BC. he proved to be a capable ruler and extended the territories of Magadha. The neighbouring rival state of Avanti, Vatsa and Kosala were defeated by him and their territories annexed to Magadha. He ruled for 18 years.