Why it matters. The statement ties the Korean Peninsula's security directly to Russia's war in Ukraine, showing how a European conflict and an Asian nuclear standoff have become linked for both Seoul and Brussels.
Background. Lee Jae-myung is South Korea's newly inaugurated president, leading a liberal administration after a turbulent political period. South Korea, a long-standing US ally, has historically pursued denuclearization of the North through diplomacy, but North Korea's growing military pact with Russia — including reported troop deployments — has hardened Seoul's stance and pushed it toward closer coordination with Europe.
What to watch next. Watch whether this Seoul-Brussels alignment translates into concrete steps, such as coordinated sanctions or expanded security cooperation, as North Korea's ties with Russia deepen.
South Korean President Lee Jae-myung and top European Union leaders reaffirmed their commitment to the “complete denuclearization of the Korean Peninsula” at a summit in Brussels on June 10, while jointly condemning North Korea’s military support for Russia’s war in Ukraine and urging Pyongyang to halt it immediately.
What the summit produced
Meeting at the European Council in Brussels, Lee sat down with Antonio Costa, the president of the European Council, and Ursula von der Leyen, president of the European Commission. The two EU figures hold the bloc’s most senior posts: Costa chairs summits of member-state leaders, while von der Leyen heads the EU’s executive arm.
In a joint statement issued afterward, the three leaders said they “express serious concern over North Korea’s nuclear and ballistic missile programs and reaffirm their commitment to the complete denuclearization of the Korean Peninsula.” North Korea, formally the Democratic People’s Republic of Korea, has continued to expand its weapons arsenal despite years of international sanctions.
A rebuke over the war in Ukraine
Lee and Costa turned sharply to North Korea’s role in Russia’s invasion of Ukraine. Pyongyang has supplied troops and munitions to Moscow over the past year, deepening a partnership that alarms both European and Asian governments. The leaders said they “condemn third-party support that enables Russia to continue its war of aggression against Ukraine, in particular support from North Korea,” and called for it to stop at once.
The statement linked two theaters of conflict that are increasingly seen as connected: a European war and the security of the Korean Peninsula. For Seoul, North Korean soldiers gaining battlefield experience and Russian technology in exchange is a direct national-security concern, not a distant one.
Maritime security and the Strait of Hormuz
The leaders also addressed disruptions to global shipping stemming from conflict involving the United States, Israel and Iran. They emphasized “freedom of navigation and safe passage in the Strait of Hormuz, the protection of civilians and civilian infrastructure, and the need for all parties to fully respect international law, including the law of the sea as reflected in the United Nations Convention on the Law of the Sea (UNCLOS).” The Strait of Hormuz is a narrow chokepoint through which a large share of the world’s seaborne oil passes, making it a critical artery for energy-dependent economies like South Korea.
A wider day of diplomacy in Belgium
Earlier in the day, Lee held a separate summit with Belgian Prime Minister Bart De Wever and met King Philippe of Belgium. The Brussels stop forms part of broader outreach by Lee’s new administration to deepen ties with European partners, who share South Korea’s concerns about North Korea, Russia and the stability of global trade routes.
The joint statement carries no binding enforcement mechanism, but it signals a coordinated diplomatic front between Seoul and Brussels on some of today’s most pressing security questions.
