<p>A dispute is escalating between Ukraine and South Korea. The disagreement stems from Ukraine’s capture of two North Korean soldiers who were fighting alongside Russia in January 2025. Both soldiers later expressed a desire to relocate to South Korea. After negotiations, they were transferred to Seoul in September.</p>
<p>Ukrainian President Volodymyr Zelensky announced the soldiers’ transfer during his speech to the U.N. General Assembly late last month, which South Korea viewed as turning a sensitive intelligence and humanitarian operation into a public diplomatic issue.</p>
<p>South Korean President Lee Jae Myung stated that Ukraine and South Korea had agreed to keep the transfer confidential due to concerns for the soldiers’ safety and the potential impact on diplomacy regarding the Korean Peninsula. Initially, Kyiv disputed the existence of such an agreement, but South Korean intelligence officials later informed lawmakers that Ukraine had requested secrecy. Seoul has since demanded an apology, while Ukrainian Foreign Minister Andrii Sybiha characterized the situation as a diplomatic misunderstanding.</p>
<p>This disagreement highlights a broader issue between Seoul and Kyiv. Ukraine views North Korea’s involvement in the conflict as indicative of a connection between European and Korean security, while South Korea is cautious about escalating tensions with North Korea or Russia.</p>
<p>The bilateral relationship has also been affected by energy trade. Ukraine’s sanctions adviser, Vladyslav Vlasiuk, reported that over 176,000 tons of petroleum products were shipped from South Korean ports to Russia in July and August, accounting for approximately 31% of Russia’s fuel imports in August. These shipments coincided with Ukrainian strikes on Russian refineries. South Korea disputed the implication that it was supplying Russia and stated it was investigating the shipments, as it still relies on Russian liquefied natural gas under long-term contracts and seeks sanctions exemptions for these supplies.</p>
<p>Despite these tensions, South Korea has supported Ukraine since Russia’s full-scale invasion, joining sanctions against Moscow and providing reconstruction funding and other assistance. While South Korea has not supplied lethal aid to Ukraine, it manufactures artillery ammunition, air-defense systems, missiles, and other weapons that Ukraine requires.</p>
<p>Under former president Yoon Suk Yeol, South Korean policy appeared more flexible, especially after the signing of a mutual-defense treaty between Russian President Vladimir Putin and North Korean leader Kim Jong Un in 2024. Seoul indicated it would reconsider supplying arms to Ukraine, and discussions included sending personnel to observe North Korean tactics, while Ukrainian officials sought air-defense systems and military equipment from Seoul.</p>
<p>In contrast, President Lee has adopted a more cautious stance, fearing that direct military support for Ukraine could prompt Russia to enhance its military technology transfers to North Korea.</p>
<p>However, Russia has already significantly increased its military cooperation with Pyongyang. South Korean and Western officials have warned that this relationship is enhancing North Korea’s military capabilities, with Ukraine believing that Moscow has shared technology related to jet-powered drones. North Korean forces are also gaining experience in a conflict characterized by drone warfare and rapid adaptation.</p>
<p>While Seoul has been careful throughout the war, Moscow has not shown similar restraint. This dynamic leaves Seoul in a position of needing to protect against an escalation that is already occurring. The dispute over the two soldiers illustrates a larger issue: South Korea is attempting to maintain distance from the conflict, but the transfer itself demonstrates the challenges of doing so.</p>