Origins: The Artillery Shell Problem

The North Korea-Russia military relationship deepened dramatically in 2023 as Russia's artillery shell consumption vastly exceeded domestic production capacity. Russia fires estimated 20,000–40,000 artillery rounds per day in peak fighting. Russia's defense industry, despite significant production increases, could not reach these levels domestically — creating a strategic dependence on external supply.

North Korea possesses the world's largest stockpiles of Soviet-compatible artillery ammunition — decades of production of 122mm, 152mm, and other calibers matching Russian systems. The DPRK had stockpiled these for potential conflict with South Korea but could export surplus to Russia at favorable terms, receiving strategic benefits far exceeding the monetary value of the shells.

US and South Korean intelligence confirmed in 2023 that North Korea had transferred artillery shells and rockets to Russia. Kim Jong-Un visited Russia in September 2023, the first trip by the North Korean leader in years — meeting Putin at the Vostochny Cosmodrome in a symbolically loaded meeting at Russia's space launch facility. The meeting was followed by identified shipments of military equipment via rail through the Russian-North Korean border crossing at Khasan.

Scale of Artillery Supply

Estimates of North Korean artillery shell transfers to Russia vary widely. South Korean intelligence has cited figures of 1 million rounds transferred in initial batches through 2023–2024. Some Western assessments suggested cumulative transfers exceeding 5–6 million rounds by early 2025 across all calibers and rocket types. This would represent a substantial percentage of Russia's total ammunition consumption in the war and would have been operationally significant in sustaining Russian artillery superiority over Ukraine during a period when Western shell supply to Ukraine was constrained.

North Korean shells have reportedly had quality issues — higher dud rates and case failures than modern production — but have still been operationally useful given the volume. Ukraine has recovered and analyzed North Korean-marked munitions from the battlefield, providing physical confirmation of supply chain.

Ballistic Missile Supply

In addition to artillery shells, North Korea reportedly supplied Russia with ballistic missiles — specifically variants of the KN-23 and KN-24 short-range ballistic missiles, which are DPRK developments inspired by Russian Iskander systems but with North Korean modifications. Ukraine confirmed the first intercept and analysis of North Korean KN-23 ballistic missiles in Russian attacks on Ukraine in late 2023.

North Korean ballistic missiles supplemented Russia's own Iskander and other ballistic missile inventories, which Russia had been consuming at high rates in strikes on Ukrainian cities and infrastructure. The North Korean missiles have reportedly had higher failure rates than Russian equivalents — but successful strikes have caused Ukrainian casualties and infrastructure damage.

Troop Deployment: The Kursk Factor

Ukraine's August 2024 incursion into Kursk oblast, Russia — the first foreign military occupation of Russian territory since WWII — created an acute need for Russian forces to retake their own territory. This appears to have been a catalyst for DPRK troop deployment, though planning likely preceded the Kursk operation.

In October–November 2024, South Korea and US intelligence confirmed North Korean soldiers were deployed to Russia — initially to Kursk oblast to participate in operations to retake Ukrainian-held Russian territory. Estimates range from 10,000 to 15,000 DPRK soldiers in the initial deployment, equipped with Russian weapons and reportedly given Russian identification documents to obscure their national origin.

DPRK troops suffered significant casualties in Kursk fighting. South Korean intelligence estimated thousands of DPRK killed and wounded by early 2025 — substantial losses for a first deployment. Ukrainians captured North Korean soldiers in Kursk, providing direct physical confirmation including DPRK military documents (though the soldiers carried fake Russian IDs, original DPRK documents were recovered).

What Does North Korea Receive?

The cooperation is explicitly transactional. North Korea receives from Russia:

• Missile technology: Russia's advanced ballistic missile and satellite technology is highly relevant to DPRK programs. Russian assistance with re-entry vehicle technology, guidance systems, and staged propulsion would significantly accelerate DPRK ICBM capability
• Satellite technology: North Korea's November 2023 successful spy satellite launch came after Kim's September cosmic visit — Western analysts noted the timing as circumstantially significant
• Combat experience: DPRK soldiers gain actual combat experience in a modern high-intensity war — something of extraordinary value to a military that has not fought since the Korean War. This experience, even at high cost, trains cadres who can transmit lessons to the broader DPRK military
• Economic benefits: Oil, food, machinery transfers of economic value to a sanctions-isolated economy
• Strategic prestige: Being genuinely allied with a major nuclear power provides leverage against both the US and China

The "Pariah Axis": Russia, Iran, and North Korea

The Russia-DPRK partnership fits within a broader pattern of cooperation among internationally isolated states: Iran has supplied Russia with Shahed kamikaze drones (used in thousands of strikes on Ukraine), shared drone production technology for a Russia-based production facility, and provided other military equipment. Belarus has served as basing for Russian operations. China has provided substantial economic lifeline through trade that offsets some sanctions impact, though officially denying military supply (with ongoing debates about dual-use goods with military application).

The emergence of this network represents a significant structural challenge to the sanctions-and-isolation strategy pursued by the West. North Korea and Iran have less to lose from further Western sanctions than nuclear powers with global economic ties — making them more easily recruited into cooperation against Western-aligned interests. Russia provides these partners with what they most value (technology, prestige, resources) in exchange for what it most needs (ammunition, drones, manpower).

Implications for Regional Security: The East Asian Dimension

The troop deployment and technology transfers have significantly alarmed South Korea. The South Korean government broke with its previous policy of not supplying lethal weapons to Ukraine, announcing in late 2024 that it was reconsidering arms transfers in light of North Korean troops being deployed against South Korea's closest strategic partner (the US, which has a mutual defense treaty with South Korea). President Yoon's government cited the combat experience North Korean military gains as a direct security threat to South Korea.

South Korea began significantly expanding its own defense production and considering transfer of 155mm shells to Ukraine directly. Japan similarly increased defense spending in response to the demonstration that the regional security order was being actively challenged. The North Korea-Russia cooperation has thus contributed to an East Asian security response mirroring the European defense spending surge triggered by Russia's invasion.