From Blood Brothers to Strategic Partners: The Evolution of South Korea-Türkiye Defense Cooperation

From Battlefield Brotherhood to Strategic Partnership

The bond between South Korea and Türkiye has long transcended ordinary diplomatic relations. For over seven decades, the two nations have referred to each other as “blood brothers,” a term rooted in the Korean War when Turkish soldiers fought and died alongside Korean troops. This emotional connection, cemented by the 721 Turkish soldiers who fell defending freedom on the Korean Peninsula, has provided a rare foundation of trust in an increasingly fragmented international system.

In an era where traditional alliances face strain from competing great powers and technological decoupling, the search for reliable partners has taken on new urgency. For Seoul, Ankara represents a bridge between Europe and Asia, a Muslim-majority democracy with extensive trade networks across the Middle East and Africa. For Türkiye, South Korea offers a model of rapid industrialization and a source of advanced military technology without the political conditions attached to Western suppliers. This convergence of interests suggests that the blood brotherhood of the past may offer a template for the strategic autonomy both nations seek in an increasingly multipolar world.

Yet history alone does not guarantee strategic relevance. In November 2025, South Korean President Lee Jae Myung arrived in Ankara for the first state visit by a Korean leader in thirteen years, signaling a deliberate effort to transform sentimental solidarity into structured, future-oriented cooperation. The visit underscored a shared recognition that in todays era of intensified great-power competition, politicized supply chains, and restricted technology access, middle powers must diversify partnerships to maintain strategic flexibility. The question facing Seoul and Ankara is no longer whether they share historical affection, but whether that trust can evolve into a comprehensive defense and industrial alliance capable of addressing twenty first century security challenges.

Forged in the Crucible of War

The origins of this exceptional relationship trace back to 1950, when Türkiye dispatched more than twenty one thousand troops to Korea as part of United Nations forces. This represented the fourth-largest contribution after the United States, Britain, and Canada. Turkish forces distinguished themselves in brutal combat engagements, earning a reputation for tenacity and courage that remains legendary in Korean military history.

Of the 721 Turkish soldiers who perished during the conflict, 462 rest at the United Nations Memorial Cemetery in Busan, a sacred site that continues to host annual commemorative ceremonies attended by veterans and officials from both nations. Türkiye was the tenth country to recognize the government of the Republic of Korea in 1949 and the third to establish a permanent embassy in Seoul after the United States and the Republic of China. This early diplomatic commitment created institutional frameworks that have persisted through decades of political change in both countries.

The Korean War legacy extends beyond monuments and memorial days. It established what South Korean Foreign Minister Cho Hyun recently described as the foundation of deep trust and friendship between the two countries. This reservoir of goodwill has enabled the relationship to withstand geopolitical shifts that have strained other alliances, creating a unique environment where defense cooperation can advance without the suspicion that often accompanies foreign military partnerships.

Complementary Defense Capabilities

The contemporary defense partnership rests on a recognition that South Korea and Türkiye possess strikingly complementary industrial strengths. Over the past two decades, Seoul has emerged as one of the worlds most dynamic defense exporters, transforming from a dependency on foreign suppliers into a technologically advanced producer of armored vehicles, self propelled artillery, naval platforms, fighter aircraft, and integrated combat systems. Korean firms have demonstrated particular excellence in systems integration, combining radar networks, missile architectures, electronic warfare capabilities, and command and control frameworks into coherent operational structures.

Meanwhile, Ankara has pursued a determined path toward strategic autonomy, achieving remarkable progress in unmanned aerial systems, missile development, and the TFX next generation fighter program. Turkish achievements in drone warfare and precision systems have already reshaped regional military calculations, while the commissioning of the TCG Anadolu as a multipurpose amphibious assault ship signals expanding maritime ambitions.

This industrial complementarity creates natural synergies. South Korea brings world class capabilities in advanced shipbuilding, submarine technology with air independent propulsion systems, and heavy ground platforms. Hyundai Rotem, a leading Korean defense contractor, has already partnered with Turkish industry on the Altay main battle tank program, providing technical support and assistance that illustrates how cooperation can reinforce rather than undermine domestic production capacity. For the TCG Anadolu to function effectively as the centerpiece of a maritime task force, Türkiye requires modern air defense destroyers, advanced frigates with integrated combat systems, and stealthy submarines, areas where Korean shipyards possess extensive experience including Aegis equipped destroyers and sophisticated amphibious platforms.

Before his arrival in Ankara, President Lee Jae Myung described the strategic vision driving this partnership in an exclusive interview, emphasizing that the relationship extends beyond economic convenience.

Türkiye is a strategic partner for Korea and an important hub in the Eurasian region. For Korea, Türkiye is not simply a production site. It is a strategic partner with whom we seek to innovate, invest and compete globally.

The potential extends beyond hardware to co-production models. Korean defense cooperation philosophy emphasizes technology collaboration and long term industrial integration rather than simple export transactions. This approach aligns with the goal of sustainable autonomy for Türkiye through carefully selected partnerships that enhance domestic capability without creating structural dependency. As both nations seek to reduce overreliance on traditional suppliers, their cooperation offers a template for how middle powers can build resilient supply chains while maintaining independent defense architectures.

A Presidential Visit Revitalizes Ties

The November 2025 visit of President Lee Jae Myung to Ankara marked a critical moment in operationalizing these strategic potentials. Meeting with Turkish President Recep Tayyip Erdogan, the leaders adopted a joint statement titled “A legacy of brotherhood, a vision for the future,” pledging to deepen their strategic partnership as they approach the seventieth anniversary of diplomatic relations in 2027. The summit produced concrete agreements spanning defense, nuclear energy, infrastructure, and veterans affairs, moving beyond ceremonial gestures to institutionalized cooperation mechanisms.

The timing reflected deliberate diplomatic choreography. Lee had just concluded participation in the G20 summit in South Africa and visited the United Arab Emirates and Egypt, demonstrating a concerted push to expand the influence of Seoul across the Middle East and Africa. Selecting Türkiye as the final destination underscored its strategic priority within this broader outreach. The visit also coincided with the second meeting of Lee and Erdogan that week, following a gathering of MIKTA, the consultative body of five middle power nations comprising Mexico, Indonesia, South Korea, Türkiye, and Australia.

During the Ankara summit, both leaders emphasized their commitment to peace, stability, and prosperity across Asia, Europe, and beyond. They reaffirmed support for the complete denuclearization of the Korean Peninsula and pledged to expand cooperation through multilateral platforms including the United Nations, the Group of 20, and the Organization for Economic Cooperation and Development. The discussions specifically addressed the evolution of defense collaboration from simple equipment transfers toward joint production, technological exchange, and training programs.

Landmark Cooperation Projects

Several specific initiatives illustrate the practical scope of deepening ties. In the defense sector, the Altay main battle tank program stands as the most visible example of industrial integration. The participation of Hyundai Rotem has provided technical foundations for Turkish tank production, while the project serves as a model for future collaboration on complex platforms. South Korea has additionally exported K9 self propelled howitzers to Türkiye and Egypt, establishing a track record of reliable heavy weapons transfers to the region.

The nuclear energy domain witnessed significant advancement during the visit of Lee, with the signing of a memorandum of understanding between Korea Electric Power Corporation and the Nuclear Energy Corporation of Türkiye. This agreement establishes frameworks for cooperation in technology, site evaluation, licensing procedures, and financial packages, specifically targeting the planned second nuclear power plant at Sinop on the Black Sea coast. Seoul hopes this MOU will serve as a stepping stone toward securing the construction contract, allowing Korean firms to contribute world class nuclear technology and operational safety expertise.

Infrastructure cooperation also advanced through agreements between Korea Expressway Corporation and the General Directorate of Highways of Türkiye, opening opportunities for joint projects in third countries across the Middle East and Eurasia. These civilian partnerships build upon substantial existing investments by major Korean corporations including Hyundai Motor Group, POSCO, Samsung, and LG, which have operated manufacturing facilities and infrastructure projects in Türkiye for years, generating approximately four point six billion dollars in direct investments through more than two hundred companies.

The two governments also signed agreements honoring Turkish veterans who supported South Korea during the conflict of 1950-53 and promoting exchanges between veterans associations and descendants. Lee visited Korean Park in Ankara, a Hyundai Motor-funded memorial, where he laid wreaths alongside four Turkish veterans and thirteen family members of fallen soldiers, reinforcing the human dimension of the strategic relationship.

Middle Powers in a Shifting World Order

Beyond specific projects, the partnership between Korea and Türkiye represents a broader structural phenomenon, the emergence of middle power coalitions in an era of great-power rivalry. Neither Seoul nor Ankara qualifies as a superpower, yet both possess advanced industrial capabilities, diversified diplomatic networks, and strategic geography that enable significant independent action. Both have demonstrated capacity to maintain alliances while pursuing autonomous interests, and both seek resilience through diversification rather than confrontation.

The MIKTA grouping provides one institutional expression of this solidarity among middle powers. Unlike security-centered blocs, MIKTA emphasizes consultative cooperation on global governance, economic stability, and development. South Korea and Türkiye utilize this platform alongside bilateral mechanisms to coordinate positions on issues ranging from supply chain resilience to artificial intelligence governance. Foreign Minister Cho has emphasized that Seoul does not pursue a simple balancing act between the United States and China, but rather evaluates national interests from a holistic, multidimensional perspective, cooperating with Washington on advanced technologies while maintaining pragmatic relations with Beijing.

This approach aligns with the strategic positioning of Ankara at the crossroads of Europe, the Middle East, and Eurasia. The role of Türkiye in diversifying global supply chains and establishing regional production hubs has become increasingly prominent, particularly as Korean companies seek alternatives to concentrated manufacturing bases. The complementary nature of Korean and Turkish defense industries, heavy platforms and naval systems from Seoul combined with drones and missiles from Ankara, offers the potential for joint production targeting third markets in the Middle East, Africa, and Central Asia.

The partnership also carries geopolitical signaling value. In a world where alliances are tested and maritime competition intensifies, cooperation between capable middle powers demonstrates that the international order will not be shaped exclusively by the largest powers. Countries with technological capacity and strategic vision can stabilize regional environments and contribute to collective security frameworks without subscribing to zero sum bloc politics.

Economic Ties Anchoring the Relationship

The defense and strategic cooperation rests upon a substantial civilian economic foundation that has developed over four decades. Since the free trade agreement entered into force in 2013, bilateral trade has increased by more than one and a half times, reaching a record high of ten point four billion dollars in 2023. This commercial exchange includes automobiles, electronics, construction, and materials, with Korean firms having established significant manufacturing presence beginning in the mid 1980s.

Hyundai Motor Company began exporting vehicles to Türkiye in 1990 and constructed an automobile factory in Izmit in 1995. Samsung Electronics collaborated with local partners to manufacture color televisions and video equipment, while POSCO and LG established industrial facilities across the country. These investments have created institutional familiarity, supply chain integration, and deep business trust that facilitate expansion into strategic sectors. When companies and engineers have already collaborated successfully in civilian industries, extending cooperation into defense and nuclear energy becomes significantly more feasible.

Both governments recognize the need to address persistent trade imbalances, which favor Seoul in terms of export values. However, as President Lee noted during his visit, much of the export growth from Korea consists of capital goods and intermediate inputs that support Turkish manufacturing and industrial development. As Türkiye expands its production and export capacity, demand for these components has naturally risen, reflecting the reality of ongoing industrialization rather than structural disadvantage.

Cultural and people-to-people exchanges complement these economic ties. South Korea has streamlined visa application processes for Turkish citizens through group submissions, expanded language support to include Turkish, and extended authorization validity to three years. Traveling minors under seventeen and seniors over sixty-five are exempt from the electronic travel authorization requirement. Interest in Korean culture is rising in Türkiye, while Turkish cuisine and art gain popularity in South Korea, creating constituencies in both societies that support closer bilateral relations.

The Next Frontier of Cooperation

Looking toward the seventieth anniversary of diplomatic relations in 2027, Seoul and Ankara have identified several frontiers for expanded collaboration. In defense, both sides anticipate moving beyond current projects toward joint development of next generation systems, including potential cooperation on the KF21 multirole fighter, long range surface to air missile systems, and integrated unmanned platforms. The leaders specifically committed to integrating unmanned systems with conventional platforms and fostering joint innovation in emerging technologies.

Beyond defense and nuclear energy, the partnership aims to expand into biotechnology, renewable energy, and artificial intelligence. The two countries are exploring cooperation on the UAE Stargate project and similar initiatives that combine Korean infrastructure capabilities with Turkish geographic positioning. In regional diplomacy, Seoul values cooperation with countries that support peace and coexistence on the Korean Peninsula, while Ankara appreciates the consistent position of South Korea regarding respect for the sovereignty and territorial integrity of Ukraine.

The evolution from blood brothers to strategic partners represents both a continuation and transformation of the bilateral relationship. The emotional bond forged during the Korean War provides a foundation of trust that remains rare in international affairs, particularly in defense cooperation where contracts span decades and industrial ecosystems intertwine with national security. Strategy now defines the future of this partnership, as both nations recognize that shared sacrifice in the 1950s must translate into shared technological advancement and security cooperation for the challenges of the 2030s.

The Essentials

• More than twenty one thousand Turkish soldiers fought in the Korean War, with 721 fatalities creating the “blood brothers” foundation for modern relations
• Bilateral trade reached a record ten point four billion dollars in 2023 under the 2013 Free Trade Agreement, with over two hundred Korean companies investing four point six billion dollars in Türkiye
• The Altay main battle tank program represents flagship defense industrial cooperation, with Hyundai Rotem providing technical assistance to Turkish production
• November 2025 witnessed the first South Korean presidential visit to Türkiye in thirteen years, producing agreements on defense, nuclear energy, and infrastructure
• A memorandum of understanding between Korea Electric Power Corporation and the Nuclear Energy Corporation of Türkiye establishes frameworks for potential Korean participation in the Sinop nuclear power plant project
• Both nations participate in MIKTA, a consultative body of five middle power nations, coordinating positions on global governance and supply chain resilience
• Seventieth anniversary of diplomatic relations will occur in 2027, with both governments planning expanded cooperation in defense, biotechnology, renewable energy, and artificial intelligence
• Defense exports of Türkiye exceeded ten billion dollars for the first time in 2024, while South Korea seeks to position itself as a reliable global defense partner with particular strengths in naval and heavy ground platforms