The Jeju Uprising, referred to in South Korea as the “April 3 Incident” or Jeju 4.3, is one of the most tragic and long-overlooked episodes in Korean history. It took place on Jeju Island, south of the peninsula, between 1947 and 1949, in a context marked by the division of the country, the emerging Cold War, and intense tensions surrounding elections and political power.
What began as a series of protests against police repression and the political division of Korea gradually escalated into an insurrection, followed by a massive crackdown. Thousands of civilians lost their lives, villages were destroyed, and the island has long carried the memory of state violence that affected several generations.
Context
To understand Jeju, one must go back to the immediate post-war period. Korea had just been liberated from Japanese occupation, yet the South remained under the control of the American military government, while the peninsula was heading towards a lasting division.
On Jeju, a significant part of the population rejected the prospect of elections held only in the southern zone, viewing them as a step towards permanent division. In 1947, demonstrations and a general strike expressed this opposition, and tensions escalated further following clashes with the police.
The island also had a particular social background. Rural and distant from the centres of power, it faced deep economic and political frustrations, which made part of the population more receptive to protest movements.
The turning point came on 3 April 1948. Guerrillas and left-leaning activists attacked several police stations and paramilitary facilities across the island. Their aim was to protest against elections planned under international supervision in a context they considered illegitimate.
The first cause lies in the division of Korea after 1945. Following liberation from Japan, the peninsula was administered separately in the North and the South, within the early Cold War framework, which fuelled a strong sense of injustice among part of Jeju’s population.
The second cause was the rejection of elections held only in the South. On Jeju, these were seen as a manoeuvre that would make division irreversible, leading to demonstrations and a general strike as early as 1947.
The third cause was the brutal repression of protests. During the March 1st demonstrations in 1947, police opened fire on the crowd, killing civilians and transforming political dissent into a much deeper crisis.
Jeju also faced long-standing social and economic tensions. The island struggled under certain constraints imposed by the authorities, including heavy policing and agricultural taxation, which deepened local resentment.
The climate was further aggravated by distrust towards the authorities, often perceived as linked to former collaborators or as imposing an external political order. In this context, leftist ideas found fertile ground among part of the population.
In 1947, demonstrations commemorating the March 1st Movement turned into violent confrontations when police attempted to disperse the crowds, pushing the protest into a spiral of radicalisation. From that point onwards, the conflict was no longer merely electoral or administrative—it became a struggle over the very legitimacy of power in the South.
A War Against Civilians
One of the darkest aspects of the Jeju Uprising is how quickly the distinction between combatants and civilians blurred. The repression did not target only armed insurgents, but entire villages, families suspected of leftist sympathies, and inhabitants caught in so-called “cleansing operations”.
From 1948, martial law was declared, and the situation worsened further in the spring of 1949, when the South Korean army launched an eradication campaign against rural guerrillas. This phase marked not only the military suppression of the movement but also mass violence that left a lasting scar on the island’s memory.
Estimates of the death toll vary depending on the sources, but generally range between 14,000 and 30,000 victims, with even higher figures sometimes suggested. Some accounts also refer to widespread destruction of villages and a significant exodus towards Japan.
Although the organised insurgency was crushed in 1949, isolated clashes continued until 1953. This shows that Jeju was not merely a brief uprising, but a prolonged conflict tied to the intensification of the Cold War in Asia.
Another factor explains the long-lasting trauma: silence. For decades, the subject remained taboo in South Korea. Victims and their families often lived in fear of being associated with communism, delaying public recognition of the violence they endured. Only much later did the country begin to open a national conversation on responsibility, memory, and reparation.
Today, the Jeju Uprising is considered a major historical turning point. It symbolises both the fractures of post-1945 Korea and the human cost of building a new state in a climate of ideological confrontation.
The event also holds an important place in contemporary Korean culture. Books, films, and commemorations have helped bring this history to a wider audience, long kept at a distance by censorship, fear, or silence. Jeju is not only the memory of a crushed revolt, but that of a society that eventually confronted one of its deepest wounds.
If it had to be said in one sentence
The Jeju Uprising was born from the rejection of Korea’s division, but its repression turned the island into a theatre of mass violence, remaining one of the greatest tragedies of twentieth-century Korean history.
“We do not part” by Han Kang : One December morning, Gyeongha receives a message from her friend Inseon. After suffering a serious hand injury, she has been urgently transferred to Seoul, leaving behind her home island and her white parrot. Confined to a hospital bed, she asks Gyeongha to take the first flight to Jeju to feed the bird before it is too late.
But that very evening, a violent storm hits the island. Freezing winds and heavy snowfall slow Gyeongha down as night begins to fall. Will she manage to reach her friend’s house? There, more than a fragile life awaits her. Carefully assembled, the story of Inseon’s family fills the space, with hundreds of archived documents recounting one of the worst massacres in Korean history—30,000 civilians killed between November 1948 and early 1949.
Like a long winter dream, Han Kang takes us between contemporary South Korea and its painful past. Impossible Farewells is both a hymn to friendship and a powerful indictment against forgetting. These pages of rare beauty bring to light a traumatic memory buried for decades.
Publication date: 23/08/2023
Nobel Prize in Literature 2024 & Prix Médicis Étranger 2023
“Jiseul” by Keum Suk Gendry-Kim The book revisits one of the darkest chapters in Korean history: the massacre of tens of thousands of inhabitants of Jeju Island in 1948, marking the establishment of Syngman Rhee’s authoritarian regime, supported by American occupation forces.
Jiseul is based on the true story of 120 villagers who hid in the caves of Seogwipo after US-led authorities labelled all residents within a 5 km coastal radius as “rioters” and ordered their execution. The word “Jiseul”, in the Jeju dialect, means potato and symbolises the islanders’ hope for survival.
Publication date: 04/03/2015
The book was adapted into a film by director O Muel
“Jeju Prayer” (비념) by Im Heung-soon Jeju Prayer is a documentary directed by Im Heung-soon, with a runtime of approximately 90 minutes.
The film forms part of a broader effort to preserve the memory of the Jeju Uprising (1948–1949), one of the most violent and long-silenced episodes in Korean history.
The documentary primarily follows an elderly woman, Kang Sang-hee, whose husband was killed during the uprising. Through her personal story, the film reveals an intimate memory of the tragedy.
It portrays Jeju Island as a vast site of remembrance, almost a land marked by the dead.
It draws connections between past and present, particularly through tensions surrounding the construction of the Gangjeong naval base.
It questions how historical wounds continue to inhabit both landscapes and people.
Release date: 03/04/2013
The Jeju uprising
The Jeju uprising : a foundation wound of modern Korea
