Indonesia Declares Independence
On 17 August 1945, two days after Japan announced its surrender, the nationalist leaders Sukarno and Mohammad Hatta proclaimed Indonesia's independence in Jakarta, then called Batavia. The declaration launched a revolution that lasted more than four years and ended Dutch colonial rule over what had been the Netherlands East Indies. It created the world's largest Muslim-majority nation and became one of the best-known examples of postwar decolonization in Asia. The event is listed under Japan because Japan's occupation and defeat created the opening for it, but the proclamation itself took place in Indonesia.
The Dutch had controlled the archipelago for centuries, first through the trading company VOC and later directly as a colonial state. From the early twentieth century an Indonesian nationalist movement grew, drawing on students, Islamic organizations, and political parties, and Sukarno became its most charismatic figure. Dutch authorities jailed or exiled many nationalists. Japan invaded in early 1942 and quickly toppled Dutch rule. The occupation was harsh, with forced labor and food shortages, yet Japan also promoted Indonesian leaders, trained youth militias and auxiliary forces, and allowed organization on a scale the Dutch never had. Late in the war it promised eventual independence.
When Japan surrendered, a power vacuum opened. Young activists pressed Sukarno and Hatta, reportedly even detaining them briefly, to declare independence without waiting for Japanese approval. The proclamation was read out in a short, simple ceremony at Sukarno's home. A constitution was soon adopted, with Sukarno as president and Hatta as vice president, and the new republic built its institutions amid great uncertainty.
The Dutch were determined to return, and Allied forces, chiefly British, arrived in late 1945 to disarm the Japanese and restore order. Fighting broke out in several places, notably the fierce battle of Surabaya in November. Negotiations produced agreements that were soon broken, and the Dutch launched major military offensives in 1947 and 1948. These were condemned internationally, and the United States, which had been wary of Indonesian communism after the republic suppressed a communist uprising at Madiun in 1948, came to see continued Dutch aggression as harmful. Pressure grew, including threats over Marshall Plan aid.
Under that pressure, the Netherlands formally transferred sovereignty at the end of 1949. Indonesia's independence day remains 17 August, though the Dutch government long recognized 1949 as the date. The revolution cost many lives, though estimates vary widely. Its legacy includes a strong national identity, Sukarno's leadership of the nonaligned movement, and the 1955 Bandung Conference, which brought Asian and African nations together.