South Korea: The Disruptor Reshaping the Global Balance of Power

The fault lines running through global politics are about as visible as they have ever been. Russia and the European Union remain locked in a staredown across the battlefields of Ukraine. Israel and Iran have put the entire Middle East on a hair-trigger. China and the United States seem to be circling one another in a kind of pre-fight shadow-boxing, maneuvering in advance of hostilities that many fear are still to come.

It is a difficult world to make sense of from any single vantage point, and a deeply complex one for any nation to try to navigate. The mood is captured well by a recurring sentiment among observers of these conflicts: that, at times, it feels as if the entire world is teetering on the precipice of war.

Yet there is a disruptive force at work in geopolitics, one that has begun to punch well above its own weight. That force is South Korea. Geographically modest, lodged on the end of a peninsula, and staring down not only a hostile northern neighbor but the full bulk of the Chinese dragon on its flank, South Korea is not the place most analysts would expect to tilt the global balance. It sits beneath the protective umbrella of the United States, it lives under a constant threat of attack, and at times it has struggled even to get along with its other regional neighbors.

But that is no longer the whole of South Korea’s story, and not by a long shot. What follows is a close look at the changing nature of the country: its growing role as a leader among the world’s regional powers, its rising military strength and prowess, and its potential to become the linchpin binding NATO, the United States, and the nations of the Pacific Rim into a single, coordinated posture.

An Evolving Korea

When people think of South Korea, any number of images might surface: the bustling capital of Seoul, the vast demilitarized zone separating the South from its mortal enemy, or simply a good bowl of bibimbap. But unless one has kept closely abreast of foreign policy, there is one description that may not come to mind: arms dealer.

Since the early 2010s, South Korea has aggressively pursued a policy of ramping up its ability to manufacture and export weapons, and the results have come with immediate effect. Over the past decade or so, arms sales have skyrocketed, climbing to the rank of the world’s ninth-largest arms exporter between 2018 and 2022. Even that, however, is not the end goal. According to President Yoon, South Korea aims to be among the top four global arms suppliers within the next few years, sitting alongside Russia, France, and the United States.

The progress made during the Yoon administration has been close to exponential. In 2021, before Yoon’s term began, South Korea recorded $7.25 billion in defense exports. In 2022, when Yoon spent most of the year in office, that figure more than doubled to $17.3 billion. And in 2023, the country nearly beat that total with a single transaction: a package worth $13.7 billion for Poland, which has in its own right become the fastest-expanding military power in all of Europe.

Layered on top of that were a highly lucrative deal to sell fighter planes to Malaysia, a major purchase of infantry fighting vehicles by Australia, and a pending arrangement to provide comprehensive air defense support to Saudi Arabia. Set against what South Korea already sells in an average year, 2023 is likely to be remembered as a banner year for the South, even by comparison to the remarkable 2022.

Nuclear Assurance and the Washington Declaration

South Korea’s rise as an arms supplier has unfolded alongside a deepening of its defense ties with the United States. That includes a direct effort by Washington to address what Seoul has long regarded as an open question: whether the United States is genuinely willing and able to defend South Korea against the North’s potential use of nuclear weapons. North Korea’s advances in missile technology, and its threats to deploy tactical warheads, have made it more pressing than ever to know whether American commitments are real.

That concern has been sharpened by what South Korea has watched unfold elsewhere. It has seen the United States, the European Union, and Russia all perform below expectations when it comes to protecting their foreign partners over the past several years. The lesson was not lost on Seoul.

In response, South Korea and the United States issued their shared Washington Declaration, which establishes a NATO-style nuclear joint-response model to deal with threats from the North. Such a provision had previously been conspicuously absent from the alliance’s defense agreements, which allowed for everyday collaboration against conventional attack but stopped short of nuclear matters. In exchange for the upgraded American pledge, South Korea reaffirmed that it does not intend to pursue independent nuclear weapons - an option that more than 70% of South Koreans supported in 2022, before Washington strengthened its guarantees.

A New Trilateral Partnership

Just months after that defensive pact was upgraded, South Korea made further headlines by unveiling a new trilateral partnership with the United States and Japan. The development was striking. Despite both being US allies, Japan and South Korea have maintained a strained relationship for a very long time, weighed down by historical grievances.

Under this new defense umbrella, however, the two countries plan to collaborate on matters ranging from missile defense to joint military exercises to so-called “contingency planning” - language widely interpreted as preparation for a joint military defense of Taiwan and other US allies in East Asia. There is still a long road to travel before the arrangement resembles anything like an Asia-Pacific NATO. Even so, it accomplishes a long-standing American goal: finally unifying Japan and South Korea into a shared posture against China.

Domestically, South Korea has reinforced this turn toward military readiness in visible ways. Its 2023 Armed Forces Day parade featured the largest military march in a decade, putting troops, tanks, drones, and ballistic missiles on display. The message, both at home and abroad, was that the country’s defense posture is being elevated deliberately and conspicuously.

Ambitions Beyond Current Capabilities

It has become clear in recent years that South Korea’s ambitions extend far past its present manufacturing capabilities. In July 2022, the country performed the first test flight of the KF-21 Boramae, a joint venture with Indonesia that will deliver an advanced, stealthy fourth-generation fighter expected to enter production by 2026. Like South Korea’s existing products, the KF-21 is positioned to be a far more affordable option than what is available from the United States in the form of the F-35 Lightning II, while still providing the wartime capability that most nations could realistically want.

On the high seas, South Korea is making strides in advanced destroyer and frigate technology, and it is contemplating the production of nuclear-powered submarines. Equally significant is the country’s exploration of strategic military transport aircraft, possibly with the capability to serve as a drone-carrying mothership.

Taken together, these developments suggest that South Korea’s current defense posture is not intended as a short-term deterrent or a passing political enthusiasm. It is an effort to establish a new and durable status quo - one in which the country is not merely a consumer of others’ technology but a sophisticated producer in its own right.

Why the Change, and Why Now?

These are impressive feats, and they represent a major shift not only in South Korea’s defense posture but in how the nation conceives of itself as a military power. The question that follows is straightforward: why, and why now?

The central reason appears to be a matter of what South Korea believes is on the horizon. Kim Jae-Yeop, Senior Researcher at the Sungkyun Institute for Global Strategy, framed it this way in conversation with Breaking Defense: “Surrounded by hostile and formidable military powers like North Korea, China, and Japan, South Korea is required to maintain an indomitable defense posture.” In other words, South Korea is surrounded by powerful and potentially hostile nations, and it has concluded that to preserve its sovereignty it must make unmistakably clear that it is not to be trifled with.

Kim continued: “This has led to Seoul’s defense industry developing and manufacturing technically reliable weapons, and utilizing the country’s own world-class industrial bases like shipbuilding, electronics, automobiles, machinery, etc.” The country’s civilian industrial strength, in this telling, is the foundation of its military rise.

A Hard Lesson in Self-Reliance

It is not difficult to see why South Korea might regard these defense concerns as paramount to its very survival. The country is threatened by an overtly aggressive northern neighbor. It shares the Yellow Sea with a rapidly militarizing and highly ambitious rising superpower. And it is a close US ally with obligations that extend across the region.

South Korea would not only be expected to act in the event of a Chinese attack on Taiwan; it must also prepare for the possibility that China would anticipate such intervention and try to pre-empt it by unleashing North Korea against the South at the same time. Compounding this, South Korea’s long and contentious relationship with militarily formidable Japan has made it important to ensure that the two nations’ priorities are kept in alignment.

Finally, as a regional power backed by a global superpower, South Korea has had to absorb a hard lesson over the past few years - one that other nations in its position have also been forced to learn. A major-power ally, whether America, Russia, China, or the European Union, may be bound by treaty to come to a regional partner’s defense, but that does not guarantee it will. In South Korea’s case, there is the added complication that its superpower partner is often at the mercy of whichever political party holds power, and that an ironclad guarantee made by one administration could easily be discarded by the next.

So South Korea, like Poland, Saudi Arabia, and other regional powers, has decided to secure its own defense regardless of whether the United States or its other allies actually show up in a crisis. On one front, that has meant bold steps to lock in defense partnerships - scaling up military exercises and interdependency with the US, and ensuring that South Korea’s and Japan’s postures toward each other are both positive and established in writing. On another, it has meant making sure that other close American allies, from Australia to Saudi Arabia to the European members of NATO, would be willing to advocate for South Korea should the need ever arise.

Building a Bridge to NATO

Integration between South Korea’s new, NATO-esque patchwork of growing alliances and the real NATO halfway across the world has been a clear priority for Seoul. The country’s self-propelled howitzers, for instance, are built to accommodate NATO-standard ammunition, with performance specifications and technological capabilities that would let them integrate easily into a larger NATO force.

That design choice is not merely about offering a product European customers would want. Interoperability with NATO is a valuable thing for South Korea to keep in its back pocket, in case it ever finds itself fighting alongside NATO forces against a growing list of shared adversaries. Geopolitically, the ability to supply NATO-compatible arms to nations around the world functions as a subtle nudge toward alignment - drawing those buyers closer to NATO, South Korea, the United States, and the rest of that global contingent, while simultaneously giving NATO a greater incentive to pursue partnerships in the Pacific Rim.

In this way, arms exports become an instrument of strategy as much as commerce. Each NATO-standard howitzer or fighter sold abroad is also a thread woven into a wider web of alignment, one that quietly knits together partners across two oceans.

The Power of Manufacturing

Then there is the matter of military production, where South Korea’s advantages are particularly pronounced. The country is exceptionally good at manufacturing in general, with many of its manufacturers doing double-duty across the civilian and military sectors. Consider Hyundai, which produces everything from modest four-door sedans to the K1A1 main battle tank. The practical consequence is that South Korea’s manufacturers possess not only the expertise but also the production capacity to pivot into arms manufacturing on short notice.

That capability has given South Korea an exceptional ability to deliver heavy weapons to partner nations quickly. In Poland, the first batch of ten K2 tanks and 24 K9 self-propelled howitzers arrived just four months after Poland finalized its purchase, and the country received its first FA-50 fighter aircraft after only ten months. This is a rare feat among global arms suppliers. By contrast, Germany finalized a contract to deliver 44 Leopard tanks to Hungary in 2018 but only delivered the first unit in August 2023 - a gap that illustrates just how unusual South Korea’s speed truly is.

This ability to produce large volumes of weaponry on short notice is not only good for exports. Those South Korean production lines turn out South Korean weapons - the very systems that South Korea’s own military is adept at using. In advance of a hypothetical attack, whether by North Korea against the South or by China against Taiwan, the hardware coming off those lines can easily be retained for domestic use, a process that grows even simpler when the same manufacturers are already filling foreign contracts.

Confidence in Replenishment

South Korea appears highly confident in its ability to rapidly produce new hardware. The clearest evidence is that the South Korean government will frequently postpone its own weapons orders so that the manufacturing industry can build more products for export. Put simply, this is not something a nation does when it feels genuinely besieged by hostile neighbors. South Korea’s willingness to take that risk anyway is a strong indicator that the country believes it could make up any domestic shortfall in record time.

The existing force is already quite robust. South Korea fields well over a thousand modern main battle tanks, more than ten thousand armored cars, several thousand self-propelled howitzers, and robust air-defense capabilities that include eight Patriot missile batteries. It operates several hundred fourth- and fifth-generation fighter jets and a sophisticated fleet that is well on its way to becoming a true blue-water navy. Its policy of mandatory military service ensures that it can call on several million reservists, and culturally, large portions of the population are more than willing to fight in defense of their sovereignty.

But in advance of a war with China - or, more likely, a two-pronged effort to intervene against a Chinese invasion of Taiwan while also repelling an assault by North Korea - the ability to absorb and replenish combat losses matters just as much as the will to show up. South Korea’s manufacturing capabilities put it above most of the world in its capacity to replenish equipment in real time. For comparison, had Russia been able to produce new equipment at a comparable rate, the war in Ukraine would in all likelihood have ended a long time ago.

The Strategy of Arms Dependency

Even the equipment South Korea exports - the materiel it effectively gives away through deals - can yield a substantial benefit to South Korea itself. The advantage at work here is one of arms dependency. Other countries that accept new military hardware produced by South Korea come to rely on South Korea for the ability to maintain that hardware and acquire new kit over time.

With that arms supply comes trade relations, closer diplomatic ties, and a vested interest among other nations in seeing South Korea continue to manufacture. Nobody wants to see South Korea drawn into a war, especially on the losing side of the outcome, because such a defeat would put all of these cheap, high-quality armaments at risk. The country’s industrial output thereby becomes a form of soft leverage, encouraging partners to keep South Korea stable and supplied.

This dynamic is further enhanced by South Korea’s efforts to help partner nations produce a large share of their own orders domestically. Poland, for example, intends to produce over half of its South Korean tanks in Polish factories, allowing the two nations to partner not just in arming Poland but in producing these Korean models for joint sale in Europe. As Lukasz Komorek, a leading director at the state-owned Polish Armaments Group, put it: “We don’t want to just play the role of subcontractor, technological transfer provider and the purchaser. We can both create the synergy and use our experiences to conquer the European markets.”

South Korea has pursued similar initiatives in India, Turkey, and elsewhere. Doing so gives those nations the ability to produce their own technology while, at the same time, building in resiliency for South Korea itself - creating the option to import its own military hardware from foreign factories should its domestic plants ever be destroyed or damaged in a major war.

The Partners Being Drawn In

The roster of partners South Korea is attracting is itself revealing. Poland has sought to vastly scale up its independent military capabilities, alarmed by Russian expansionism in Ukraine. Saudi Arabia is looking to become a major military player in the Middle East. Finland, Romania, the Baltic states, and other Eastern European nations are turning to South Korea for relatively inexpensive equipment that can arrive fast.

Australia, much like South Korea itself, increasingly recognizes that it will need to provide a counterweight against China in the region.

These are all nations with strong mutual relations with the United States, South Korea’s principal military partner. And they are all nations that, like South Korea, have concluded that they need to take their defense into their own hands. South Korea’s arms exports alone cannot build a global coalition among these non-superpower states, all banding together in their shared interest - but they amount to a remarkably strong start.

A New Order Takes Shape

When one takes a grand view of South Korea’s changes over the past few years, it becomes hard to read the overarching goal as anything less than becoming the linchpin of a formal or informal Asia-Pacific alliance. Although it has long been a US ally, and long shared similar objectives with Japan, it has now cemented those ties with a scale and a formality never seen before.

South Korea’s arms-supply partnerships with Australia give it a second mechanism to ingratiate itself with the Five Eyes intelligence alliance, which links Australia, Canada, New Zealand, the United Kingdom, and the United States. Its partnership with Japan and the US does not formally include Taiwan, but both Taiwan and the nearby nations of Vietnam and the Philippines also maintain strong defense relationships with the United States, informally tying all six nations together. And its military-industrial contracts with not only Australia but India, Vietnam, and Indonesia draw in several other nations that are not necessarily comfortable with the prospect of Chinese dominance in the Far East. In sum, South Korea has fashioned itself into an indispensable intermediary - a position further strengthened by its geographical location and its prodigious manufacturing capacity.

A Counterweight to China

The ultimate goal is to serve as a counterweight to China. Tensions between Xi Jinping’s Chinese Communist Party and the global West are at an all-time high and show no sign of easing. China may be coming to believe that the window for a Taiwan invasion is now-or-never, just as its debt-trap diplomacy around the world has begun to falter and its population grows older. Rapid militarization and the risk of violent escalation demand an answer, and it appears that South Korea is rising to meet the challenge.

It bears emphasizing that the goal is most likely to avoid a war rather than to win one. A united Asia-Pacific region could, ideally, be enough to deter China from ever launching military operations in the first place. But that deterrence strategy only works if China’s potential adversaries can credibly signal their willingness to fight a full-scale war should it come to that - and South Korea has sent precisely that signal, clear as day.

South Korea’s growing relevance as a regional player also allows it to push back against China’s non-military methods of asserting power. Like nearly every other Asian nation, South Korea has a tightly interdependent trade relationship with China, one that grants Beijing valuable leverage to keep its neighbors in line. The logic runs that if one of those neighbors grows unruly, China can throttle that nation’s economy until it returns to compliance.

But South Korea’s growing manufacturing capability, combined with its military-industrial relationships with India, Indonesia, Japan, and other countries that also depend on Chinese trade, provides two key advantages. First, South Korea has become increasingly believable as a potential counterweight to Chinese economic pressure. Second, strong mutual trade relationships allow all these nations to regard one another, at the very least, as a friend of a friend. When it comes to the real implications of fighting a trade war, that means these nations can more easily band together to resist economic pressure from China, coordinating with one another through South Korea.

Challenges Ahead

Of course, the full story of this regional shift has yet to be written, and there are plenty of potential pitfalls that could keep South Korea from realizing its goals. Chief among them is the breakneck pace the country has been sustaining. Since 2022, it has launched its first indigenously produced space rocket, completed test flights of the Boramae aircraft, announced several new arms-production initiatives, closed multiple multibillion-dollar deals, and greatly expanded its foreign clientele.

That is an extraordinary rate of progress, and it is entirely fair to be impressed, as defense experts around the world have been. But rapid expansion of this kind carries the potential for catastrophic collapse from a range of sources - supply shortages, financial missteps, or a failure to keep expectations reasonable about what South Korea can actually achieve.

On arms exports specifically, it is worth emphasizing just how tenuous these plans remain in their early stages. On one hand, the prospect of a South Korean supplier is tantalizing for the current leadership of many European nations, where concern about Russia and a broader turn toward a more defense-oriented political right have fueled their interest in South Korean products. On the other hand, a shift in those political tides could lead to South Korea losing contracts before its industry reaches equilibrium.

Even in countries like Saudi Arabia, where the ruling regime’s priorities are relatively stable, South Korea cannot expect these orders to keep flowing forever. Eventually it will need either to find new buyers to absorb its supply or to scale down production in the years ahead.

The Logic of Proactivity

South Korea’s current posture is one that prizes being proactive. It is reaching out to global partners for arms exports. It is taking pains to fill an open niche in the market. It is pushing its manufacturing and research-and-development capabilities past anything the world had actually asked for. And it is taking the first step in demanding that its ties with the United States be strengthened, rather than waiting for Washington to take the initiative.

But in a more fundamental sense, the very fact that South Korea can do any of this at all is a shrewd reaction to a shifting global balance. None of it could have worked if the United States and the Asia-Pacific region were not searching for ways to counter China, if other regional powers were not urgently looking to expand their own defensive capability, and if South Korea’s military-industrial complex had not risen to the occasion. Give South Korea a few more years under these conditions, working at the pace it has been, and it seems entirely plausible that the country could become a global defense powerhouse for decades to come. Should the global balance shift before that transformation is complete, however, this very risky and very expensive process could come crashing down.

Despite that potential for failure, the remarkableness of South Korea’s recent moves is hard to overstate. It is highly uncommon for a nation in South Korea’s position - living under the umbrella of a global superpower’s protection - to seize the initiative in this way. And so far, the gamble is paying off. The country’s industrial capacity, its unique history and perspective, and its geographical and geopolitical position all mean that it can be a pivotal influence in the decades to come.

The world is now watching the dominoes begin to fall, adjusting to the arrival of a major new player that few saw coming.

Frequently Asked Questions

Where does South Korea rank among the world’s arms exporters, and what is its goal?

South Korea climbed to the rank of the world’s ninth-largest arms exporter between 2018 and 2022. President Yoon has set the goal of joining the top four global suppliers within the next few years, placing South Korea alongside Russia, France, and the United States.

How fast have South Korea’s defense exports grown under the Yoon administration?

The growth has been close to exponential. South Korea recorded $7.25 billion in defense exports in 2021, before Yoon’s term began. That figure more than doubled to $17.3 billion in 2022, and in 2023 a single deal with Poland worth $13.7 billion nearly matched the entire prior year on its own.

What is the Washington Declaration and what did South Korea give up in exchange?

The Washington Declaration is a shared agreement between South Korea and the United States that establishes a NATO-style nuclear joint-response model to address threats from North Korea. Earlier defense agreements had allowed collaboration against conventional attack but conspicuously omitted nuclear matters. In exchange for the strengthened American pledge, South Korea reaffirmed that it does not intend to pursue independent nuclear weapons—an option more than 70% of South Koreans supported in 2022 before Washington upgraded its guarantees.

How quickly can South Korea deliver weapons compared to other suppliers?

Remarkably quickly. Poland received its first batch of ten K2 tanks and 24 K9 self-propelled howitzers just four months after finalizing its purchase, and its first FA-50 fighter aircraft after only ten months. By contrast, Germany finalized a contract to deliver 44 Leopard tanks to Hungary in 2018 but delivered the first unit only in August 2023—a gap that illustrates just how unusual South Korea’s speed truly is.

What are the main risks to South Korea’s arms export strategy?

The chief risk is the breakneck pace of its expansion, which could trigger catastrophic collapse from supply shortages, financial missteps, or unrealistic expectations. On exports specifically, shifting political tides among European buyers could cost South Korea contracts before its industry reaches equilibrium, and even stable customers like Saudi Arabia will not place orders forever—meaning the country will eventually need new buyers or must scale down production.

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