Deepening North Korea-Russia Military Cooperation: An Analysis of Risks from Alleged Troop Expansions and New Missile Deployments

Executive Summary

Claims by Ukraine's Main Directorate of Intelligence (GUR) and President Zelenskyy regarding an additional deployment of 30,000–50,000 North Korean troops and the delivery of new Hwasong-11C missiles remain unverified allegations originating solely from Ukrainian sources. North Korea, through a statement by Kim Yo Jong, Deputy Department Director of the Workers' Party of Korea, has officially denied these claims as groundless, creating a direct conflict between the two sides' assertions. In contrast, the existing deployment of 8,500 troops and the combat use of KN-23 and KN-24 missiles have been partially corroborated by French intelligence and multiple media outlets, lending them higher credibility. Policy responses require a dual-track approach: distinguishing between verified facts and unverified claims, allocating immediate resources to address the former while refraining from using the latter as a basis for policy until independent verification is complete. Engagement with Europe should continue to focus on humanitarian aid and intelligence sharing, with an emphasis on managing the risks of premature escalation.

I. Situational Analysis

Deepening North Korea-Russia Military Cooperation: Allegations of Expanded Troop Deployments and New Missile Deployments

1. Background and Timeline

The turning point for closer North Korea-Russia military ties was the September 2023 summit at the Vostochny Cosmodrome. The summit concluded without a press conference or a joint statement [8]. The choice of a spaceport as the venue signaled that future cooperation between the two countries would expand into space and military technology [8].

In March 2024, Russia vetoed the extension of the UN Security Council's Panel of Experts, which monitors the implementation of sanctions against North Korea [8]. This move effectively neutralized the existing sanctions monitoring regime [8]. In June of the same year, North Korea and Russia signed a Treaty on Comprehensive Strategic Partnership [8]. This treaty included a mutual defense clause [17].

In late 2024, North Korea dispatched troops to defend Russia's Kursk region. The international community initially estimated the deployment size to be between 14,000 and 15,000 troops [4]. According to a report by South Korea's National Intelligence Service (NIS) to the National Assembly's Intelligence Committee, North Korean casualties are estimated to exceed 4,700 [12]. The Defense Intelligence Agency (DIA) analyzed that approximately 20,000 containers have been shipped from the port of Rason to Russia, which could contain up to 9.4 million 152mm artillery shells [12].

2. Current Situation

Vadym Skibitsky, deputy head of Ukraine's Main Directorate of Intelligence (GUR), stated that the current number of North Korean troops in Russia is 8,500 [1][7]. He explained that this figure includes 1,000 combat engineers and demining personnel, as well as 400 drone operators [1]. It was also claimed that many of the drone operators had gained direct or indirect operational experience during previous deployments [1].

President Zelenskyy further stated that Russia might request an additional 30,000 to 50,000 troops from North Korea [4][17]. However, the basis for this figure was not disclosed. The Hungarian media outlet HVG reported that if this estimate is accurate, the war could escalate to an unprecedented scale, while noting that its report was conditional on Ukrainian military intelligence [13]. The Kyiv Independent also quoted Zelenskyy, reporting that "Russia is preparing to receive an additional 30,000 North Korean soldiers," but this too was a re-citation of the Ukrainian claim [17].

Separately, Ukraine's GUR told Ukrayinska Pravda that Russia had received its first shipment of a new North Korean ballistic missile, the Hwasong-11C (KN-30) [9]. This would be the third type of North Korean missile deployed in combat, following the previously confirmed use of the KN-23 and KN-24 [9]. The Hwasong-11C is reportedly heavier than the Iskander-M [9]. President Zelenskyy also stated that at least seven people were killed in an airstrike on Zaporizhzhia involving the use of a North Korean ballistic missile [14]. Zelenskyy claimed that Russia's military dependence on North Korea has deepened following Ukrainian strikes on oil refineries deep inside Russia, particularly the attack on Tobolsk in Siberia [15].

All of these reports share a common origin: the Ukrainian government and its intelligence agencies, or Western and local media outlets citing them. Because the information on troop numbers and missile deliveries comes from a single Ukrainian channel, it cannot be treated as confirmed fact until it is independently cross-verified.

3. North Korea's Rebuttal

North Korea has officially denied the allegations of additional troop deployments. In a statement titled "Stand on Major International Issues" released through the Korean Central News Agency (KCNA) on August 19, Kim Yo Jong, Deputy Department Director of the Workers' Party of Korea, stated, "The rumor about an additional dispatch of our army, invented and spread by the Zelenskyy clique, is a self-staged plot which is totally groundless" [11]. Kim directly refuted President Zelenskyy's claim of an additional 30,000 to 50,000 troops, describing the allegation as "groundless" [16]. The South China Morning Post reported on her statement, quoting her use of the phrase "a self-staged incident" [16].

The timing of Kim Yo Jong's denial came shortly after Zelenskyy's allegation about additional troops and also coincided with the GUR's announcement of the 8,500-troop figure. It is noteworthy that North Korea's denial specifically targeted "additional" deployments, while it did not issue a separate statement on the existing troop presence or the deployment of missile units.

4. Key Actors and Interests

The Ukrainian Government and its Main Directorate of Intelligence (GUR)are continuously releasing information on troop numbers and suspected missile deliveries. From Ukraine's perspective, there is an incentive to highlight the threat of closer North Korea-Russia ties to secure additional military support from the West. President Zelenskyy's statement of 30,000 to 50,000 troops appears to be an upward revision of estimates within a month, which necessitates independent verification of the information's source and reliability.

North Koreahas adopted a stance of selectively refuting allegations of "additional deployments" without denying the "deployment itself." This can be read as a calculated move to treat existing deployments and arms support as a fait accompli while distancing itself from the controversy over new deployments, which could be framed as an act of escalation.

Russiahas not issued an official statement. However, if the reports of the Hwasong-11C delivery are true, it could be interpreted as Russia seeking to diversify its missile arsenal beyond the existing KN-23 and KN-24.

The United States and other Western intelligence agencieshave provided relatively consistent estimates for the initial deployment (14,000–15,000 troops) but have largely just re-cited Ukrainian-sourced information regarding the additional 30,000 to 50,000 troops.

5. Key Issues

First, the current deployment figure of 8,500 troops relies on a single source—Ukrainian intelligence—and requires independent confirmation. Second, the allegation of an additional 30,000 to 50,000 troops has been officially denied by North Korea and its source is unclear, making it premature to use as a basis for policy decisions at this time. Third, the report of the Hwasong-11C delivery remains at the stage of a single media report citing the GUR, and requires follow-up confirmation regarding its actual deployment and use. Since the expansion of troop deployments and the advancement of weapons systems are distinct issues, it is necessary to separate these two developments and monitor their respective verification processes.

II. In-Depth Analysis

Deepening North Korea-Russia Military Cooperation: An In-Depth Analysis of Alleged Troop Expansions and New Missile Deployments

1. Analysis of Root Causes

North Korea's motivation for continuing troop deployments and arms support is not economic compensation. According to a report by the National Intelligence Service, North Korean casualties are estimated to exceed 4,700 [12]. Approximately 20,000 containers have been shipped from the port of Rason, which could hold up to 9.4 million 152mm artillery shells [12]. Despite this level of human and material investment, there is no clear evidence of a so-called "wartime boom" in the North Korean economy [12]. Based on macroeconomic indicators such as market prices, assessments suggest that Russian energy and food aid has not been a significant driver of the North Korean economy [12].

What, then, is North Korea gaining? The answer is combat data. Experts analyze that the use of North Korean weapons on the Ukrainian battlefield has led to improved accuracy for its nuclear-capable missiles [3]. The report from Ukraine's GUR that the Hwasong-11C (KN-30), a new model heavier than the Iskander-M, was delivered for the first time [9] aligns with the interpretation that North Korea is securing opportunities to test its weapons in combat against Western air defense systems in exchange for its troop deployments. The troop deployments can be understood through the same logic. The Ukrainian claim that many of the 400 drone operators accumulated operational know-how through previous deployment experience [1] suggests the possibility that North Korea is systematically building up combat experience by rotating its troops. However, as this is a claim from a single source—Ukrainian intelligence—it is premature to accept it at face value.

2. Structural Context

Political Structure: Neutralizing Sanctions and Treaty-Based Alignment

The closer alignment between North Korea and Russia is not an accidental development but has proceeded on an institutional foundation. When Russia vetoed the extension of the UN Security Council's Panel of Experts monitoring North Korea sanctions in March 2024, the international community's sanctions enforcement monitoring system effectively ceased to function [8]. The Treaty on Comprehensive Strategic Partnership, signed in June of the same year, included a mutual defense clause [17]. This was the first time since the Cold War-era alliance treaty between North Korea and the Soviet Union that the bilateral relationship was elevated to the level of a treaty-bound obligation. With the twin developments of the monitoring regime's dismantlement and the new treaty, the conditions were set for North Korea's arms transfers and troop deployments to proceed without international legal constraints.

Economic Structure: The Sustainability of Support Without Reciprocal Benefits

The fact that North Korea continues to provide large-scale support without substantial economic compensation paradoxically highlights the political and military nature of this cooperation [12]. In a typical alliance, it would be natural for support in personnel and materiel to be followed by corresponding economic benefits. However, the trend observed so far suggests that North Korea has not seen significant improvements in the scale or sustainability of energy and food aid [12]. This is a structural indicator that the North Korean leadership's objective in this cooperation is not short-term economic recovery but rather the medium- to long-term acquisition of military technology and the strengthening of its negotiating leverage with Russia.

Security Structure: Combat Data and Precision-Guidance Technology Testing

The deployment of North Korean missile units in western Russia, reportedly confirmed separately by Ukraine's GUR and French intelligence, is an issue that should be treated apart from the controversy over troop numbers. This aligns with academic analyses suggesting that the accuracy of North Korean missiles is improving through combat experience [3]. Reports that a third missile type, the Hwasong-11C, has entered combat or combat testing after the KN-23 and KN-24 [9] indicate that North Korea's missile program is moving beyond testing single systems to validating a portfolio of multiple weapon systems. This is a structural variable that challenges the very baseline assumptions about North Korean missile accuracy upon which South Korea's deterrence posture has been built.

3. Historical Precedents and Comparative Cases

The practice of securing opportunities for combat-testing weapon systems in exchange for troop deployments is a pattern that repeatedly appeared in Cold War proxy conflicts. Structurally similar examples include the Soviet Union testing its homegrown missiles and air defense systems in the Vietnam and Middle East wars, and Cuba receiving Soviet military and economic aid after dispatching troops to the Angolan Civil War. However, what distinguishes this case from past Cold War proxy wars is that North Korea is providing both troops and weapons, and in return is demanding not economic compensation but the opportunity for technical validation itself [3][12]. This can be interpreted as a decision based on the judgment that, having already developed considerable missile capabilities on its own, what North Korea lacks is not funding but combat data.

Furthermore, this case is unusual in that a permanent member of the UN Security Council has itself dismantled the monitoring system for sanctions resolutions it signed [8]. Unlike past instances where great powers unofficially circumvented sanctions during the Cold War, this action institutionally dismantled the monitoring mechanism itself, making it a more profound challenge to the international non-proliferation regime.

4. Key Variables Shaping Developments

First is the veracity of the troop numbers. The allegation of an additional 30,000 to 50,000 troops, raised by President Zelenskyy, is single-source information based on an estimate that was revised upward within a month [4][17]. In response, Kim Yo Jong, Deputy Department Director of the Workers' Party of Korea, retorted via the Korean Central News Agency that "the rumor about an additional dispatch of our army, invented and spread by the Zelenskyy clique, is a self-staged plot which is totally groundless" [11][16]. With the claims of Ukraine and North Korea in direct opposition, it is currently difficult to determine the actual scale of deployment or the existence of such plans based on either side's announcements alone. The key will be whether independent cross-verification emerges from Western intelligence agencies or South Korea's NIS, beyond the GUR's claims.

Second is the question of substantive progress in missile technology validation. If reports of the Hwasong-11C's delivery and combat testing are confirmed [9], this would serve as evidence of a tangible advancement in North Korea's missile capabilities, regardless of the troop deployment controversy. When combined with academic analysis on improved strike accuracy [3], this variable has more direct implications for the security posture on the Korean Peninsula than the troop numbers do.

Third is the shift in Ukraine's strategy toward deep strikes against Russia. President Zelenskyy claimed that long-range attacks, such as the strike on the Tobolsk refinery in Siberia, have deepened Russia's military dependence on North Korea [15]. If this claim is true, the scale and type of Russia's requests to North Korea could be linked to the intensity of future Ukrainian deep strikes. However, this too is based on a Ukrainian announcement, with no official confirmation from Russia or North Korea.

Fourth are the assessments of multilateral security organizations like the United Nations Command (UNC). The warning from the Deputy Commander of the United Nations Command that North Korea's experience in the Ukraine war could become a factor in its military superiority over the South [18] shows that this issue is expanding beyond the bilateral Ukraine-Russia framework to directly impact the security landscape of the Korean Peninsula. Further confirmation is needed to determine whether this warning is based on specific intelligence or is a reflection of circumstantial concerns.

Synthesizing these variables, the question of expanded troop deployments remains at a stage where contradictory claims from Ukraine and North Korea coexist. In contrast, the diversification of missile types and their reported combat use have been raised through multiple independent channels, and thus warrant relatively greater attention. The most rational approach at present is to treat these two issues separately while awaiting further verification.