Today’s East Asia is facing a disquietingly similar moment to 19th-century Europe. The U.S.-led security structure of the post-WWII era is tottering due to China’s aggressive rise, Russia’s revisionist activities, and North Korea’s nuclear adventurism. While the liberal international order is stumbling, the lesson from Bismarck’s unsuccessful Reinsurance Treaty is clear. Ad hoc agreements or personal diplomacy cannot substitute for durable and institutionalized cooperation.
In the late 19th century, Europe’s master strategist Otto von Bismarck wanted to guarantee Germany’s security in an increasingly unstable environment. The Concert of Europe system, structured after the Napoleonic Wars, was gradually crumbling. In order to avoid a nightmare—being encircled on two fronts—Bismarck signed the Reinsurance Treaty with Russia in 1887.
However, the treaty was a vulnerable mechanism since it heavily relied on Bismarck’s personal sense of equilibrium and authority. When he was dismissed in 1890, the treaty was abrogated and Europe’s stability was seriously impaired. In less than a quarter of a century, the rigid alliance system pushed Europe onto a collision course with World War I.
The New Encirclement Problem
Bismarck’s nightmare was Germany being caught between France and Russia. To avoid isolation, he attempted to keep at least one great power neutral in a military conflict. Similar logic can be applied to today’s East Asia. The new alignment among China, Russia, and North Korea contains the risk of encircling the U.S., Japan, and South Korea across multiple domains.
During the Bismarck era, the crumbling concert system incentivized Germany to desperately search for allies. In contrast, in today’s East Asia, the risk originates from how the U.S. and its Asian allies may underestimate the extent to which adversaries can align closely with one another and end up producing fragmented measures instead of a comprehensive strategy.
Lessons from Bismarck’s Reinsurance
The failure of Bismarck’s Reinsurance Treaty offers three strategic lessons to today’s Indo-Pacific. First, linkage is power. Bismarck understood that diplomacy cannot be compartmentalized. The Reinsurance Treaty stabilized multiple fronts by linking Germany’s promises to both Austria and Russia. Once the treaty collapsed, such linkages were loosened, which led to cascading insecurity in the region. For the U.S., Japan, and South Korea, linkage should be more than a simple trilateral summit. It refers to integrating deterrence in multiple domains including North Korean sanctions, energy security with Russia, and technological rivalry with China.
Second, negligence would engender catastrophe. Bismarck warned that the entire system might collapse if a single front is neglected. When Germany neglected its relations with Russia, encirclement vis-à-vis Germany was tightened thanks to the creation of the Franco-Russian alliance. The equivalent in the contemporary era is Seoul taking an ambiguous stance on Taiwan issues or Tokyo’s hesitation to support South Korea in a Korean contingency. If an ally (or quasi-ally in the case of Japan-South Korea relations) does not treat counterparties’ crises seriously, Beijing and Pyongyang will immediately exploit the opportunity. Therefore, trilateral cooperation should be inseparable; an armed attack against a certain area should be considered an attack on the entire trilateral framework.
Third, institutions outlast individuals. The Reinsurance Treaty remained functional only while Bismarck was in power. Once he was dismissed, his successors lacked both vision and the institutional mechanisms to maintain what Bismarck had structured. On the contrary, the Triple Entente—albeit unofficial in the initial phase, gradually became institutionalized—evolved into a durable counterweight against German power. The task for Washington, Tokyo, and Seoul is to institutionalize robust trilateral cooperation that could withstand political turnover.
An East Asian Version of a Triple Entente
The most relevant analogy is the development after the Reinsurance Treaty lost its effectiveness, rather than the treaty itself. As erstwhile rivals, the UK, France, and Russia recognized that Germany’s expansion could not be deterred unless the three countries opted for deeper consolidation. The gradual institutionalization, which led to staff talks and coordinated mobilization planning, created resilience.
For the U.S., Japan, and South Korea, such a path is necessary. The 2023 Camp David trilateral summit was a starting point. Yet it should be a foundation, not a ceiling. Joint missile defense systems, an interoperable command-and-control structure, and a shared emergency plan that covers both the Taiwan Strait and the Korean Peninsula are essential.
The greatest risk lies in complacency. As late 19th-century Europe misinterpreted a vulnerable treaty as a source of constant stability, today’s leaders might believe that a couple of summits would be sufficient. However, without institutional depth, such a structure of cooperation would likely be influenced by domestic political changes, including U.S. isolationism, Japanese pacifist backlash, or South Korean partisan disputes.
Policy Recommendation
To avoid repeating Bismarck’s precedent, Washington, Tokyo, and Seoul should institutionalize a permanent trilateral defense council that goes beyond ad hoc summitry. By designating a rotating leadership akin to NATO’s North Atlantic Council, they can guarantee durability against political cycles. In addition, this council should prevent adversaries from implementing a divide-and-conquer strategy by establishing a common strategic concept interconnecting the Taiwan and Korean fronts. Cooperation in the defense-industrial field should center on missile defense, drones, and AI-based systems so that critical gaps can be swiftly filled before enemies exploit such weaknesses. Lastly, the trilateral should engage middle powers like Australia, the Philippines, and major ASEAN countries to prevent China and Russia from peeling away potential swing states. Such an approach parallels the UK’s 19th-century efforts to expand its negotiation network beyond the European continent.
Conclusion
Bismarck’s Reinsurance Treaty was an excellent yet fragile attempt to sustain a crumbling European order. The collapse of the treaty forced Europe to face catastrophe. Today’s East Asia is witnessing its own version of an unsuccessful concert system. While the opposing bloc is coalescing, the U.S.-Japan-South Korea trilateral cooperation remains far from solid.
In that sense, the choice for the U.S., Japan, and South Korea is stark: either trilateral cooperation develops into an Asian counterpart of the Triple Entente or it slips into the tragic cycle that European countries ultimately faced in 1914.
[Image generated by Google AI Studio]
The views and opinions expressed in this article are those of the author.
Dr. Ju Hyung Kim currently serves as the president at the Security Management Institute, a defense think tank affiliated with the South Korean National Assembly. He has been involved in numerous defense projects and has provided consultation to several key organizations, including the Republic of Korea Joint Chiefs of Staff, the Defense Acquisition Program Administration, the Ministry of National Defense, the Korea Institute for Defense Analysis, the Agency for Defense Development, and the Korea Research Institute for Defense Technology Planning and Advancement. He holds a doctoral degree in international relations from the National Graduate Institute for Policy Studies (GRIPS) in Japan, a master’s degree in conflict management from the Johns Hopkins University School of Advanced International Studies (SAIS), and a degree in public policy from Seoul National University’s Graduate School of Public Administration (GSPA).
