Ukraine confronts Seoul over the fate of North Korean prisoners from the Donbas

Introduction: when two distant fronts converge in Seoul

A diplomatic meeting that says a lot about this globalized war

On July 1, 2026, Ukrainian Foreign Minister Andrii Sybiha met his South Korean counterpart Cho Hyun in Seoul, a trip that shows how far the war in Ukraine has stopped being a regional conflict and become a truly global affair, reaching all the way to the Korean peninsula, according to Al Jazeera coverage published on July 1, 2026.

At the heart of this meeting: the fate of North Korean prisoners of war, captured by Ukrainian forces while fighting alongside the Russian army in the Donbas region and Kursk oblast, a situation that would have seemed implausible to anyone just three years ago.

Why this issue goes beyond a simple humanitarian question

This isn't just a matter of international humanitarian law. It's a brutal indicator of the scale of the alliance between Pyongyang and Moscow, and of how North Korea sacrifices its own soldiers on a front that isn't even its own, in a war of Russian aggression against Ukraine.

Two soldiers who want one simple thing: freedom

The wish to defect, a powerful political signal

According to reports, two North Korean soldiers captured in 2025 have explicitly expressed a wish to defect to South Korea rather than be returned to North Korea, where their fate as former prisoners of war abroad would be uncertain at best, and dangerous at worst.

This individual choice, however modest in number, sends a resounding political signal: even soldiers trained and indoctrinated by one of the most closed regimes on earth can, once confronted with reality on the ground, choose freedom over returning to a system that sent them to fight without their genuine consent.

Seoul ready to take them in, a clear legal position

South Korea constitutionally regards all North Koreans as South Korean citizens by right, a position that legally simplifies the eventual reception of these prisoners should they confirm their wish to go South rather than return North.

Kyiv and Seoul have already reached what diplomats describe as an agreement in principle on the question of repatriation, an encouraging first step even though the concrete details still need to be finalized between the two capitals.

Kursk, the forgotten battlefield where North Korean troops bleed

Massive losses according to Ukrainian military intelligence

According to estimates from Ukraine's main intelligence directorate, the HUR, North Korean troops deployed in Russia's Kursk oblast have suffered more than 7,000 casualties between 2024 and 2025, a figure higher than earlier South Korean and British estimates that put the total at around 6,000 casualties, according to the Kyiv Independent.

This toll, whichever estimate is used, illustrates the appalling human price paid by young North Korean soldiers sent to fight in a foreign war, without experience of modern high-intensity combat and often used as cannon fodder by Russian command.

A contingent that remains massive despite the losses

According to South Korean estimates relayed by the Yonhap news agency, roughly 11,000 North Korean soldiers were still present in Kursk oblast at the start of 2026, suggesting Pyongyang keeps feeding this front with fresh troops despite the already known scale of casualties suffered by its own forces.

This persistence of North Korean commitment, despite considerable losses, shows the depth of the military alliance sealed between Kim Jong Un and Vladimir Putin, an alliance apparently willing to sacrifice thousands of lives to cement this strategic partnership.

A mutual defense pact with very concrete consequences

The comprehensive strategic partnership treaty, a historic turning point

The deployment of North Korean troops in Russia stems directly from the Comprehensive Strategic Partnership Treaty signed between Moscow and Pyongyang, a text that includes a mutual defense clause reminiscent of Cold War alliances, but applied here very concretely on Ukrainian soil.

This treaty represents a major shift in the regional geopolitical balance, transforming North Korea from a largely isolated pariah state into an active military partner directly engaged in the largest European conflict since World War II.

North Korean weapons directly feeding the Russian war effort

Beyond sending troops, Russia now receives massive shipments of North Korean munitions, notably 122mm and 152mm caliber shells, as well as ballistic missiles, logistical support that lets Moscow partially offset the struggles of its own defense industrial base, strained by Western sanctions.

This growing military cooperation, economic and technological, between the two regimes legitimately worries Western chancelleries, who see it as the consolidation of an increasingly coordinated authoritarian axis against Ukraine and its Western backers.

Beijing, an interested spectator of this Russian-Korean rapprochement

Xi Jinping in Pyongyang, a visit that is anything but trivial

Chinese President Xi Jinping traveled to Pyongyang on June 8 and 9, 2026, his first visit to the North Korean capital in roughly seven years, a trip underscoring the strategic importance Beijing places on its relations with its North Korean neighbor, even as the latter deepens its military alliance with Russia.

This visit comes at a particularly sensitive moment, as China seeks to maintain its influence over Pyongyang without appearing directly involved in North Korean military support for Russia's war against Ukraine, an increasingly difficult balancing act to maintain.

North Korea's near-total economic dependence on China

China accounts for roughly 98% of North Korea's total foreign trade according to 2024 data, an almost absolute economic dependence that gives Beijing considerable leverage over Pyongyang's strategic decisions, including whether to continue its military involvement alongside Russia.

This Chinese influence over North Korea puts Beijing in an ambiguous position: officially neutral on the war in Ukraine, yet objectively holding the means to influence, if it genuinely wished to, the behavior of one of Russia's main direct military backers on the ground.

What this diplomacy reveals about democratic solidarity

Kyiv and Seoul, two democracies facing authoritarian neighbors

This emerging cooperation between Ukraine and South Korea on the question of North Korean prisoners of war illustrates a broader convergence of interests between two democracies each confronting, in its own way, an aggressive authoritarian neighbor: Russia and North Korea respectively.

This solidarity, still modest diplomatically, could deepen in the months ahead, especially if Seoul decided to increase its material support for the Ukrainian defense effort, an option regularly floated but so far limited by South Korean diplomacy's traditional caution.

A precedent that could inspire other humanitarian efforts

Handling this North Korean prisoner issue could set a useful precedent for other humanitarian questions tied to this conflict, notably the fate of Russian soldiers themselves captured by Ukraine, or Ukrainian civilians forcibly deported to Russia, one of the most painful files of this war.

This methodical, transparent approach to the North Korean prisoner-of-war question stands in sharp contrast to the total opacity that usually surrounds the fate of soldiers captured in other conflicts involving closed authoritarian regimes.

Western chancelleries' cautious but real reaction

Washington and Brussels watching closely

The United States and the European Union are closely following this rapprochement between Moscow and Pyongyang, aware that every North Korean soldier committed to the front and every shipment of munitions delivered to Russia directly extends Vladimir Putin's ability to continue his aggression against Ukraine despite Western sanctions.

Several Western capitals have already tightened targeted sanctions against weapons transfer networks between North Korea and Russia, even though the real effectiveness of these measures remains limited against the two regimes' declared determination to sustain this military cooperation.

South Korea, a cautious but increasingly engaged ally

Seoul, historically cautious on issues tied to the war in Ukraine for fear of North Korean retaliation, appears to be gradually adopting a bolder stance, as shown by this diplomatic meeting with Kyiv on the sensitive question of prisoners of war.

This South Korean shift could, in time, open the door to more direct material support for the Ukrainian defense effort, a scenario Pyongyang and Moscow would no doubt watch with growing concern.

The precedent this case sets for other captured soldiers

Russian prisoners, an equally sensitive file

Ukraine's handling of the North Korean prisoner file runs parallel to its management, far larger in number, of Russian prisoners of war held by Kyiv, a file negotiated within the broader framework of regular prisoner exchanges between the two warring countries since 2022.

The relative transparency Ukraine shows on the North Korean soldiers' case contrasts with Moscow's usual opacity about the fate of its own prisoners, a contrast that strengthens Kyiv's moral standing with its international partners.

A test for contemporary international humanitarian law

This case also serves as an interesting test for contemporary international humanitarian law, confronted with an unprecedented situation: prisoners of war from a third country, North Korea, technically not an official party to the conflict, yet whose troops actively fight alongside one of the belligerents.

How this case is resolved could set an important legal precedent for future conflicts involving foreign auxiliary forces, an increasingly frequent phenomenon in contemporary warfare.

Conclusion: an increasingly visible authoritarian alliance

What this meeting in Seoul confirms about the ongoing war

The meeting between Andrii Sybiha and Cho Hyun in Seoul confirms, if confirmation were still needed, that the war in Ukraine now unfolds within a far broader geopolitical framework than a simple territorial conflict between two neighboring countries. It pits Ukraine and its Western backers against an increasingly coordinated authoritarian axis linking Russia, North Korea and, more discreetly but very much present, China.

The fate of these North Korean prisoners, however marginal it may seem against the scale of the conflict, reveals the human reality of this alliance: thousands of young soldiers sacrificed far from home, in a war that has nothing to do with them, serving a pact between dictators.

The urgency of sustaining Western pressure on this axis

Faced with this growing coordination between authoritarian regimes, the West can no longer afford to treat these developments as isolated incidents. Every North Korean soldier sent to fight in Russia, every shell delivered to Moscow by Pyongyang, every visit by Xi Jinping to Pyongyang must be understood as part of the same strategy hostile to Western democratic interests and to Ukrainian sovereignty.

By Maxime Marquette, columnist

Columnist's transparency note

Who I am and my acknowledged biases

I am a columnist, not a diplomat or a certified specialist in inter-Korean relations. This analysis draws on coverage from Al Jazeera and the Kyiv Independent, cited in the sources below. My acknowledged bias is pro-Ukraine and pro-democracy: I view Russia, North Korea and, to a lesser official degree, China as coordinated threats to the rules-based international order.

I credit Ukrainian and South Korean diplomacy here for its measured, humane handling of a complex file, without claiming to know the exact details of the bilateral negotiations still underway between the two capitals.

What I don't know

I do not have the exact number of North Korean prisoners currently held by Ukraine, nor the precise timeline for any eventual transfer to South Korea, as this information had not yet been made public at the time of writing. I have not invented any testimony or statement: all information reported comes from the journalistic sources cited below.

Sources

Primary sources

Al Jazeera, North Korea's Kim hails unshakeable will to develop ties with China's Xi — July 1, 2026

Secondary sources

The Kyiv Independent, North Korean troops took over 7,000 casualties in Russia's Kursk Oblast, HUR claims

Ministry of Defence of Ukraine, official portal — accessed July 2026

Ukrainska Pravda, English edition — ongoing coverage of the war

United24 Media, official Ukrainian news — July 2026

Military Times, coverage of military developments in Eastern Europe — 2026