Taufa’ahau, who named himself King George Tupou after the King George of England and Hanover, about whom he had heard so much from the missionaries, established his authority over Vava’u in 1833, and, after a series of wars, added Tongatapu to his conquests in 1852. Everywhere that King George Tupou went, the people converted to Christianity and were baptized.
First written code of law for Tonga: The unity that resulted helped Tonga to retain its independence during the period of European colonisation of the Pacific. Another factor that helped in this regard was the promulgation, with the help of the missionaries, of the first written code of law for Tonga in 1839. The code limited the power of the chiefs and consolidated the King’s position (Düring 1990). The European Connection with Tonga, James Bade, http://www.eucnetwork.org.nz/activities/conference/conference_auckland_06/docs/jbade.p