Battle of Kotabaru

Shortly after the proclamation of Indonesian independence on 17 August 1945, nationalist youths (pemuda) began seizing power and administrative authority from the Japanese garrison stationed there. In Central Java, they had largely seized civil powers by late September, and negotiations began with Japanese troops for the garrisoned units to surrender their arms to the Indonesians. In some cases, negotiations went favorably for Indonesians, and Japanese commanders surrendered their weapons and relocated outside the major cities, such as in Surakarta. In Yogyakarta, former members of PETA (a Japanese-established volunteer unit) banded together to form part of the Yogyakarta branch of the People's Security Agency (BKR, later People's Security Army/TKR). On 5 October, Sultan of Yogyakarta Hamengkubuwono IX declared his affiliation to the declared Republic of Indonesia, and the Japanese resident of the city was apprehended by the pemuda. ==Battle==

On 6 October, local pemuda negotiated with the city's Kempeitai commander based in the Kotabaru area of Yogyakarta, one major Otzuka, for the surrender of weapons, but the commander refused. The negotiations went on through the night, and Otzuka offered to hand over the weapons if provided with orders from his superior officer, but the Indonesians refused this, and clashes began around 4 AM on 7 October. In the heat of the fighting, the Indonesian negotiators returned inside the garrison and again offered an opportunity to surrender - which was accepted by Otzuka, provided the weapons were handed over to the Sultan. Fighting ended at around 10:30, and around 360 Japanese were taken prisoner. ==Aftermath==

Following the surrender, the Japanese commander visited Hamengkubuwono IX, formally surrendering the garrison's weapons which was handed over to the newly formed People's Security Army. A monument was later erected to commemorate the battle and the 21 Indonesians killed in the fighting, whose names were used as street names in the Kotabaru area. ==References==