On 17 August 1945, Indonesia’s independence was proclaimed by Sukarno and Mohammad Hatta, the founding fathers who would become the nation’s first president and vice president. This historic declaration marked the birth of the Republic of Indonesia, coming in the wake of Japan’s unconditional surrender to the Allied Forces, which brought an end to the bloody Pacific theater of World War II.
While independence was meant to inspire new hope for a brighter future, the young republic faced a long and arduous journey. Beyond the physical battles of the national revolution, it also endured relentless diplomatic struggles to uphold and defend the vision of an independent nation.
The Diplomatic Struggles
Following Japan’s official surrender, the Netherlands, Indonesia’s former colonizer, returned alongside the Allied Forces in an attempt to reassert control over the Dutch East Indies, which had already transformed into the Republic of Indonesia. This return sparked widespread conflict, as the newly proclaimed nation was determined never again to fall under colonial rule.
It was a complicated period in which the former colony had already established its own government, yet its existence was denied by the Netherlands, which simultaneously set up its own administration known as the Netherlands Indies Civil Administration (NICA).
In reality, amid the armed resistance of Indonesian republicans, circumstances compelled the Netherlands to enter negotiations on an ostensibly equal footing. This was despite its refusal to formally acknowledge the existence or sovereignty of the Republic of Indonesia.
These negotiations became the arena of Indonesia’s diplomatic struggle, where its leaders and pioneering diplomats wielded public international law as their weapon in the fight for independence.
Treaties on the Road to Sovereignty Recognition
Indonesia’s diplomatic struggle unfolded through a series of bilateral treaties that gradually strengthened its position in the pursuit of international recognition. The first milestone was the Linggarjati Agreement, which was officially signed on 25 March 1947. As nationalist resistance grew stronger, the British, unwilling to become deeply involved in an unnecessary war, pressured the Netherlands to enter peace talks with the Indonesian Government to de-escalate the conflict. The Netherlands, through this agreement, recognized Indonesia’s de facto authority over Java, Madura, and Sumatra Islands. The parties also agreed to form the United States of Indonesia (Republik Indonesia Serikat) and the Netherlands-Indonesian Union, with the Queen of the Netherlands serving as its head. Although the agreement fell short of recognizing full sovereignty of the republic, it marked a crucial shift, as the Netherlands recognized Indonesia as an entity exercising effective governmental authority and capable of entering into international agreements.
When the Linggarjati Agreement collapsed due to conflicting interpretations, it triggered the first Dutch Police Action (known in Indonesia as the Military Aggression I) on 21 July 1947. This marked a decisive escalation, as the conflict increasingly drew international attention. The newly formed United Nations (“UN”) then became involved and established the Committee of Good Offices (comprising Australia, Belgium, and the United States) to facilitate negotiations on board USS Renville, an American warship. The negotiation resulted in the Renville Agreement of 17 January 1948. While the Renville imposed significant territorial and military concessions in Indonesia, forcing it to accept the Van Mook Line and withdraw its troops from Dutch-occupied territories, it simultaneously elevated the dispute to the international stage. By placing its resolution under UN supervision, the conflict was no longer confined to a Dutch colonial matter.
Despite the Renville Agreement, hostilities persisted as the Dutch launched their second Police Action (Military Aggression II) on 19 December 1948. Indonesia’s capital at the time, Yogyakarta, fell under Dutch military occupation, while the republic’s leaders were captured and exiled. Yet the republic endured through an emergency government and continued armed resistance. This resilience, combined with mounting international pressure on the Netherlands, paved the way for the Roem–Roijen Agreement of 7 May 1949. Among its provisions were the restoration of the Indonesian Government to Yogyakarta and the commitment of both parties to participate in the forthcoming Roundtable Conference (Konferensi Meja Bundar) in The Hague, which ultimately culminated in the Netherlands’ de jure recognition of Indonesian sovereignty on 27 December 1949.
Quasi‑Recognition of Indonesia’s Emerging Republic
Indonesia’s diplomatic struggle presented a unique paradox. The Netherlands continued to deny Indonesia’s sovereignty yet was repeatedly compelled to negotiate with the representatives of the republic’s government. The Linggarjati Agreement was the clearest early example. Although the Netherlands did not recognize Indonesia as a sovereign state, its willingness to negotiate directly with Indonesian representatives and acknowledge Indonesia’s de facto authority reflected a growing practical acceptance of Indonesia as a functioning entity capable of representing its own interests and entering into international agreements. This situation may be understood as a form of quasi-recognition, in which Indonesia’s de jure sovereignty remained contested, while its role as a legitimate counterpart in international negotiations and agreements was increasingly accepted in practice.
This emerging status of quasi-recognition provided Indonesia with an important diplomatic foothold, as those bilateral engagements helped strengthen its international position and attract broader international support. The first Dutch Police Action (Military Aggression I) in 1947 prompted UN involvement, while several states expressed support for Indonesia. The Arab Republic of Egypt was among the earliest states to recognize and support Indonesia even before the signing of the Linggarjati Agreement. The Republic of India also played an essential role in mobilizing international support, including through the Asian Relations Conference in 1947. The Commonwealth of Australia likewise showed support through its labor movement, although formal recognition by the Australian Government came only after the Netherlands’s sovereignty recognition in 1949. Such support gradually enhanced Indonesia’s diplomatic standing and consistently placed pressure on the Netherlands to remain at the negotiating table.
Indonesia’s experience therefore shows that international recognition can emerge through a gradual process of practical engagement. Before the Netherlands recognized Indonesian sovereignty, Indonesia had strengthened its position through international support and its ability to participate in negotiations concerning its own future. The Netherlands’ repeated willingness to negotiate and enter into agreements with Indonesia was itself a significant indication of this development. Although these engagements did not constitute formal recognition, they reflected an increasing practical acceptance of Indonesia as a legitimate negotiating counterpart capable of representing its own interests. This intermediate position captures the significance of quasi-recognition in Indonesia’s struggle in defending independence through diplomatic channels.
The Struggle of Defending Independence through International Law
Indonesia’s independence was proclaimed on 17 August 1945, but proclamation alone did not make sovereignty secure. The years that followed saw the struggles unfold both on the battlefield and at the negotiating table. On the battlefield, military resistance prevented the return of Dutch colonial rule in Indonesia. At the negotiating table, from the Linggarjati Agreement to the Roundtable Conference, diplomacy and international law proved equally crucial in securing international support and advancing recognition of Indonesia’s sovereignty.
This multifaceted struggle offers a broader historical lesson that independence and nation-building are rarely achieved through a single means. It reflects the national spirit of collective effort, uniting diverse actors, from frontline fighters to lawyers and diplomats, toward the shared goal of defending Indonesia’s independence and securing its sovereignty.
