The reign of Nangklao (as he was posthumously known) saw the renewal of Western contacts. In 1822, British East India Company agent John Crawfurd's mission to Siam laid the groundwork for a British request for Siamese support in the First Anglo-Burmese War, which broke out in 1824. Nangklao provided fleets and elephants to rush through Burmese forests. He also sent Siamese armies to participate in the invasion of Burma since the British promised Siam the conquered lands. Phraya Chumporn ordered the forced migration of Mergui (a common practice in Southeast Asia regarding the newly-conquered lands), which had been conquered by the British. The British were frustrated at Phraya Chumporn's actions, and hostilities were heightened. Nangklao ordered the Siamese armies to leave to avoid further conflict.