Heroic Events in Yogyakarta The power struggle in Yogyakarta began on September 26, 1945, when government employees and companies controlled by Japan staged a strike. They demanded that Japan surrender all offices to the Indonesian side. 10:00 WIB. Heroic Events in Surabaya There was a flag incident at the Yamato Hotel, Tunjungan Surabaya. The Dutch fly the Red and Blue flag on the hotel roof. The people then stormed the hotel, lowered, and tore the blue flag to be hoisted again. This incident occurred on September 19, 1945. Heroic Events in Semarang Semarang Heroic Event On October 15, 1945, Japanese troops attacked the city of Semarang and were confronted by TKR and other warriors. The battle lasted for five days. As a result of this battle, thousands of young men died and hundreds of Japanese were killed. To commemorate the incident, in Semarang the Tugu Muda Monument was erected. Heroic Events in Aceh Aceh Heroic Events On 6 October 1945, youth from community leaders formed the In...