Indonesian National Revolution
Battle of Surabaya

The Battle of Surabaya was the heaviest and bloodiest single battle of the revolution and became a national symbol of Indonesian resistance. Pemuda groups in Surabaya, the second largest city in Indonesia, seized arms and ammunition from the Japanese and set up two new organisations; the Indonesia National Committee (KNI) and the People's Security Council (BKR). By the time the Allied forces arrived at the end of October 1945, the pemuda foothold in Surabaya city was described as "a strong unified fortress".

The city itself was in pandemonium. There was bloody hand-to-hand fighting on every street corner. Bodies were strewn everywhere. Decapitated, dismembered trunks lay piled one on top of the other... Indonesians were shooting and stabbing and murdering wildly

— Sukarno

In September and October 1945 Europeans and pro-Dutch Eurasians were attacked and killed by Indonesian mobs. Ferocious fighting erupted when 6,000 British Indian troops landed in the city. Sukarno and Hatta negotiated a ceasefire between the Republicans and the British forces led by Brigadier Mallaby. Mallaby was killed on 30 October 1945 while he was travelling about Surabaya under a white flag to spread the news about the cease fire agreement and rescue some stranded Mahratta troops, despite being warned of the danger by Force 136 troops. Following the killing of Mallaby on 30 October, the British sent more troops into the city from 10 November under the cover of air attacks. Although the European forces largely captured the city in three days, the poorly armed Republicans fought on until 29 November and thousands died as the population fled to the countryside.

Despite the military defeat suffered by the Republicans and a loss of manpower and weaponry that would severely hamper Republican forces for the rest of the revolution, the battle and defence mounted by the Indonesians galvanised the nation in support of independence and helped garner international attention. For the Dutch, it removed any doubt that the Republic was a well-organised resistance with popular support. It also convinced Britain to lie on the side of neutrality in the revolution, and within a few years, Britain would support the Republican cause in the United Nations. The last British troops left Indonesia in November 1946, but by this time 55,000 Dutch troops had landed in Java.
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