South Korea Recalls Ambassador to Ukraine: North Korean Soldier Transfer Dispute and Seoul's Difficult Military Aid Dilemma

South Korea announced on Thursday the recall of its ambassador to Ukraine, the latest diplomatic escalation between Seoul and Kyiv over the transfer of two captured North Korean soldiers.

According to BBC reports, Ukrainian President Zelensky publicly announced during his speech at the UN General Assembly last month that Ukraine had transferred the two captured North Korean soldiers to Seoul. South Korea accused the Ukrainian side of violating a confidentiality agreement previously reached between the two sides, but Zelensky's office denied that such an agreement had ever existed—the two sides' accounts on whether a confidentiality arrangement had been reached are fundamentally at odds.

South Korean Foreign Minister Cho Hyun said earlier this week that he had received an apology from the Ukrainian side, but according to local media reports, he believed the apology did not meet Seoul's expectations. Ukrainian Foreign Ministry spokesperson Georgiy Tichy said in a statement on Thursday that "diplomacy should prevail over emotion," and stated that "despite Seoul's decision to recall the ambassador, Ukraine remains willing to resume constructive dialogue—even if it takes time." On the same day, South Korea's Foreign Ministry said it would continue consultations with the Ukrainian side, hoping that "pending issues can be resolved smoothly."

Behind the confidentiality dispute lies a sensitive nerve in South Korean domestic politics. South Korean President Lee Jae-myung characterized Zelensky's public disclosure as "extremely disappointing" and said the matter concerns national security. His office explained that the confidentiality arrangement was partly intended to protect the families of the two North Korean soldiers in the North, and that the Ukrainian side also wished to avoid being criticized for missing an opportunity to exchange the captured soldiers for Ukrainian POWs. However, South Korea's opposition party accused Lee Jae-myung of intending to conceal the fact of the transfer in order to placate Pyongyang. Zelensky particularly noted in his UN General Assembly speech that it was "not easy" for the two North Koreans to be "captured alive."

The two North Korean soldiers were members of the units that North Korea deployed to Russia in 2024, where its own troops have actually entered the fighting. The entry of North Korean troops has internationalized the conflict, escalating it from weapons aid to direct troop participation—and the country pushed into the spotlight is South Korea, which insists on not sending lethal weapons to countries at war.

In July this year, South Korea announced a $100 million aid package to Ukraine, expanding its previous non-lethal material aid which had mainly consisted of helmets, body armor, and medical equipment. However, since Russia's full-scale invasion, South Korea has consistently refused to break its long-standing policy of not providing lethal weapons to any country in a state of war. Kyiv, meanwhile, continues to pressure Seoul to provide advanced air defense missiles to counter Russian drone and missile strikes on Ukraine's energy infrastructure.

Russia's Foreign Ministry has issued a warning: if South Korea provides weapons to Ukraine, Russia would have "no choice but to take retaliatory measures," but did not specify what actions it would take.

The structure of this pincer is becoming clear: on one side, Ukraine, backed by the Western camp, applies pressure through public opinion and diplomatic means; on the other, Russia exerts reverse deterrence with retaliatory threats. Caught in the middle is South Korea—which has long pursued a policy of "maintaining friendly relations with all neighbors," viewing Moscow and Beijing as key partners to influence Pyongyang, and this marginal balance is being squeezed into a narrow gap by wartime international politics.

Lee Jae-myung's office pointed out that the Ukrainian side had given prior notice that the soldiers would be mentioned in the speech, but had not revealed in advance the fact of the transfer itself. Zelensky's office denied that any confidentiality agreement had existed between the two sides—what South Korea calls a "tacit understanding" is fundamentally not recognized by the Ukrainian side. What this diplomatic tug-of-war reveals is a middle power that refuses to be directly drawn into the war being squeezed into an increasingly narrow space by wartime international politics: North Korean troops have actually entered the fighting, confidentiality understandings can be unilaterally disclosed by either side at any moment, and the threats of aid and retaliation hang overhead simultaneously, leaving less and less room to maneuver for itself.