But on August 18, 1945, four days before the formation of BKR, Japan disbanded PETA and Heiho. The responsibility to accommodate former PETA and Heiho members was handed to BPKKP. President Sukarno on 23 August 1945 announced the establishment of BKR. The President made a speech by inviting youth volunteers, former members of PETA, Heiho, and the Imperial Japanese Navy to gather on August 24, 1945 in their respective regions. In Jakarta, youth and former PETA successfully formulated the BKR structure in accordance with the territorial structure of the Japanese occupation. These youths call themselves BKR administrators at the central level consisting of Kaprawi, Sutaklasana, Latief Hendraningrat, Arifin Abdurrachman, Machmud and Zulkifli Lubis. Meanwhile, the formation of BKR outside Jakarta was spearheaded by Arudji Kartawinata (West Java), Drg Mustopo (East Java), and Sudirman (Central Java). In addition to BKR Land, BKR Sea was also formed which was spearheaded by former students and teachers from the High School of Sailing () and the sailors from the Shipping Service () consisting of Mas Pardi, Adam, Eddy Martadinata and R Suryadi. Especially in West Java, Hidayat and Kartakusumah as former KNIL officers joined and led the BKR of the Central Bandung Railway Station () and other railway stations. Due to limited communication facilities at that time, not all regions in Indonesia know the formation of BKR. In eastern Sumatra and Aceh, BKR never formed. But generally the youths in the area formed an organization that would form the core of the army. In Aceh, youth established the Indonesian Youth Force (API; ), and youths in Palembang formed the People's Security Guard (PKR; ) or the People's Security Guard Agency (BPKR; ). The youth who disagreed with the establishment of the BKR formed separate resistance organizations which generally supported the independence cause. In Bandung there was the Indonesian Youth Student Association (P3I; ), in Surabaya there was the Indonesian Young Generation (AMI; ), in Padang there is the Indonesian Youth Information Center (BPPI; ), and in South Kalimantan there is the Youth League of the Republic of Indonesia (BPRI; ). On 29 August 1945 the Central Indonesian National Committee (KNIP) was established and authorized by the government. Then KNIP endorsed the establishment of the BKR Center in Jakarta.