Russia and North Korea open a new route for their wartime partnership

Russia and North Korea opened their first road bridge across the Tumen River on September 7th 2026, giving the two countries a new land route as their military relationship deepens during Russia’s war against Ukraine. Trucks began using the crossing for freight the same day. The bridge is only part of what has been built.

Sentinel-2 imagery analysed for this article and Russian procurement records show a much larger border-processing project around the crossing. An approximate measurement using Copernicus Browser put the principal developed area on the Russian side at about 18 hectares, compared with roughly five hectares on the North Korean side. The Khasan checkpoint is initially designed to handle 300 vehicles a day, with capacity planned to rise to as many as 800.  Oleksandr Danylyuk, chairman of the Kyiv-based Center for Defence Reforms and an associate fellow in military sciences at the Royal United Services Institute (RUSI), said the new crossing gives the two countries another logistics option. He previously served as chief adviser to Ukraine’s defence minister, special adviser to the head of Ukraine’s Foreign Intelligence Service and assistant to the commander-in-chief of the Ukrainian armed forces.

“They had this one railroad only, and they need to have some other options,” Danylyuk said in an interview.

Russia and North Korea already had the railway crossing at Khasan and Tumangang, alongside maritime routes connecting North Korea with ports in Russia’s Far East. Danylyuk linked the additional road connection to military cooperation and the equipment Russia receives from North Korean factories.

“They need to improve logistics for these purposes, to support each other militarily,” he said.

Sentinel-2 imagery cannot establish whether North Korean weapons are being transported across the bridge. With its resolution, individual vehicles and their cargo cannot be identified reliably.

In 2024, Russia and North Korea signed a comprehensive strategic partnership treaty containing a mutual defence provision. North Korean troops were later deployed to support Russia’s war against Ukraine.

Built for more traffic

Construction around the crossing can be followed through satellite imagery. Sentinel-2 images reviewed for this article show extensive changes on both sides of the Tumen River between June 2025 and July 2026. By March 2026, the bridge alignment was visibly continuous. By July, substantial processing areas and road infrastructure were visible on both banks.

The measurements were made by tracing the principal developed areas visible in Copernicus Browser. They are approximate visual estimates rather than cadastral boundaries. Russian procurement documents demonstrate for what the infrastructure is intended. Plans for Khasan describe four freight lanes, two bus lanes, two passenger-car lanes and two reserve lanes, alongside separate passenger and freight-processing buildings, passport and customs facilities, quarantine functions, vehicle inspection points and deep-inspection bays.

Russia has also announced upgrades to more than 100 kilometres of road towards Vladivostok, connecting the crossing with the wider road network in Primorsky Krai. A Sentinel-2 image from September 12th, five days after the opening, shows the completed crossing and facilities on both sides. Most of the major supporting infrastructure visible in September was already in place by July.

The wartime relationship

Han Ki-bum spent more than two decades analysing North Korea inside South Korea’s National Intelligence Service. From 2013 to 2016, he served as the agency’s first deputy director, responsible for North Korean and overseas affairs. He is now an adjunct senior fellow at the Asan Institute for Policy Studies. Han has said relations with Russia changed markedly in 2023. What had largely been an exchange of North Korean weapons and ammunition for foreign currency and food widened into summits, a new treaty, troop deployments and contacts across the two governments.

Han described the process as institutionalization, although he does not consider it complete. Political decisions in Moscow and Pyongyang still drive much of the relationship, while the war has accelerated it. He expects the road to increase exchanges between North Korea and Russia’s Primorsky Krai, but doubts it will produce a dramatic rise in trade.

North Korea’s industrial system remains heavily dependent on China, Han said. Its economic compatibility with Russia is weaker, Moscow is farther away and the Russian Far East offers a much smaller economic base than north-eastern China. He cautioned against treating the new Russian crossing as equivalent to North Korea’s major bridge links with China.

Han considers Russian assistance in some areas of conventional weapons development highly plausible. He pointed to drones and air-defence systems, two areas in which North Korea has had weaknesses. Some improvements, he said, have subsequently appeared in equipment displayed by Pyongyang. He is more cautious about advanced missile and nuclear technology. Russia has an immediate reason to help improve North Korean short-range ballistic missiles used under battlefield conditions, Han said. Evidence for transfers involving longer-range systems, warships or the strategic development of North Korea’s nuclear programme is less conclusive.

Lessons from the battlefield

North Korean forces are gaining battlefield experience in Ukraine. Han cautioned against assuming that all of it could be transferred directly to the Korean peninsula. Western Russia has extensive open terrain; Korea is mountainous. Climate and geography would shape combat differently. He identified drone warfare, artillery and missile operations, air defence, communications and command systems as areas where experience gained in Ukraine could improve North Korean forces.

Closer ties with Moscow have also weakened the international framework built to constrain Pyongyang, Han said. Russia’s approach to UN sanctions and its military relationship with North Korea have made efforts towards de-nuclearisation more difficult. North and South Korea remain technically at war, Danylyuk noted, while the United States has a treaty commitment to defend the South. “It should be a matter of concern for South Korea, for sure,” he said.

Danylyuk, meanwhile, sees Russia’s military alliance with Pyongyang as a direct security concern for Seoul and Washington. North Korean troops and weapons are being used in Europe, while Pyongyang is gaining military experience and receiving Russian support.

From Korea to the Black Sea

Romania’s defence relationship with South Korea has moved from weapons purchases towards local production. Tudor Curtifan, editor-in-chief of DefenseRomania and a Romanian defence and foreign-policy analyst, points to Bucharest’s 2024 contract for Hanwha Aerospace’s K9 Thunder self-propelled howitzers. Romania ordered 54 K9 systems, with 36 due to be produced locally. Hanwha is also developing a plant at Petrești, in Dâmbovița county. Curtifan said Russia’s invasion accelerated a relationship that predates the war. Romania and South Korea established a strategic partnership in 2008. The deployment of North Korean troops in Ukraine has added a new security dimension.

“The internationalization of the war by the Russian Federation, with the presence of North Korean troops on the Ukrainian front, has made the geostrategic interests of the two states intersect even more,” Curtifan said. “East Asia and Eastern Europe are much closer strategically than they are geographically.”

In addition to Romania, Poland has become an even larger European example of defence-industrial cooperation with South Korea. Both countries sits on NATO’s Eastern Flank, next to Ukraine, where North Korean troops have fought alongside Russian forces.

Beyond the war

Han does not expect relations between Moscow and Pyongyang to return to where they were before the war. Russia could still use North Korean labour during reconstruction, he said, while Pyongyang would have reasons to preserve Russian economic and military assistance and Moscow’s diplomatic support. As long as Vladimir Putin and Kim Jong Un remain in power, he considers a rapid deterioration in relations unlikely.

China’s economic weight and proximity will continue to limit how far Russia can displace it. Han expects some loosening if the war ends and Russia’s reconstruction needs eventually decline. Moscow could remain substantially more important to Pyongyang than it was before 2022 without replacing China or sustaining the present intensity of military cooperation.

The new bridge adds a road connection to the railway and maritime routes the two countries already use. Russian documents show a crossing designed for freight and higher traffic. Satellite imagery shows the infrastructure built around it, but not what cargo will dominate the route.

Ana Pisarenco is a journalist based in Moldova. She runs the independent media project eurOpinii.