Conflict began between Burma and the British when the Konbaung dynasty decided to expand into Arakan in the state of Assam, close to British-held Chittagong in India. This led to the First Anglo-Burmese War (1824–26). The British dispatched a large seaborne expedition that took Rangoon without a fight in 1824. In Danuphyu, at the Ayeyarwadddy Delta, Burmese General Maha Bandula was killed and his armies routed. Burma was forced to cede Assam and other northern provinces. The 1826 Treaty of Yandabo formally ended the First Anglo-Burmese War, the longest and the most expensive war in the history of British India. Fifteen thousand European and Indian soldiers died, together with an unknown number of Burmese army and civilian casualties. The campaign cost the British between 5 and 13 million pounds sterling (between 18 and $48 billion in 2020 U.S. dollars) which led to an economic crisis in British India in 1833.