Purnananda spent most of his premiership in suppressing rebellions, forging diplomatic ties and fighting over the Barkandazes.
Purnanada installed Kinaram, a minor son of Charing Raja Kadam Dighala Gohain, on the throne.
Later the strength of the army was increased, divided into 18 companies of 100 sepoys each, and stationed at both Guahati and Jorhat.
[3][4] In 1803 under the command of Bhadari Barbarua, Burhagohain attacked Kachari king Krishna Chandra because he refused to send back some fugitives.
[5] Purnananda entered into an agreement with Sarbananda Singha, the chief of the Moamariyas of Bengmara (present-day Tinisukia), by which he ceded to the latter territory between the Brahmaputra and the Burhi Dihing and accepted his title Barsenapati (Great General).
He let Chandrakanta Singha remain as the king, but became the de facto ruler with the title of Mantri Phukan.
Badan Chandra immediately satisfied his grudge by ruthlessly killing and plundering Purnananda's relatives and supporters.