In March 1945, the Japanese established the Investigating Committee for Preparatory Work for Independence (BPUPK) as the initial stage of the establishment of independence for the area under the control of the Japanese 16th Army. At its first meeting in May, Soepomo spoke of national integration and against personal individualism, while Muhammad Yamin suggested that the new nation should claim British Borneo, British Malaya, Portuguese Timor, and all the pre-war territories of the Dutch East Indies. The committee drafted the 1945 Constitution, which remains in force, though now much amended. On 9 August 1945 Sukarno, Hatta, and Radjiman Wediodiningrat were flown to meet Marshal Hisaichi Terauchi in Vietnam. They were told that Japan intended to announce Indonesian independence on 24 August. After the Japanese surrender, however, Sukarno unilaterally proclaimed Indonesian independence on 17 August. A later UN report stated that four million people died in Indonesia as a result of the Japanese occupation.