The simulated conflict ended without regime change in Pyongyang, allowing Kim Jong Un to claim a political victory. While avoiding nuclear escalation may seem prudent, such an outcome could deal a lasting blow to the credibility of America’s extended deterrence in East Asia.

The Guardian Tiger scenario should not be dismissed as an academic exercise. It reveals a critical vulnerability in the psychological foundation of deterrence: the perception among adversaries and allies of American willingness to use nuclear weapons in defense of its partners. If allies conclude that Washington will not cross the nuclear threshold even after a nuclear attack, they may question the value of the nuclear umbrella. Adversaries, meanwhile, may learn that nuclear coercion, carefully calibrated, can succeed.

In the simulation, North Korea escalated to a tactical nuclear strike against a South Korean Navy destroyer in the East Sea (Guardian Tiger I) and later against the Chinhae naval base (Guardian Tiger II), home to the Republic of Korea Navy’s Submarine Force Command and occasionally used for allied submarine visits. According to the report, American leaders debated nuclear retaliation but settled on conventional “pulsed” strikes.

In a real-world scenario, such strikes could plausibly involve precision-guided munitions from long-range bombers like the B1-B and Tomahawk cruise missiles launched from Arleigh Burke-class destroyers, aimed at targets such as missile transporter-erector launchers, hardened artillery positions along the DMZ, and command-and-control facilities near Pyongyang. In the exercise, the US stopped short of regime change, seeking to avoid further nuclear escalation and prevent a direct war with China—a decision that would have allowed Pyongyang to absorb the damage, count the survival of its regime as a strategic win, and enter negotiations from a stronger position.

Extended deterrence depends on more than military capability. It is rooted in the belief, shared by allies and adversaries alike, that the United States is willing to defend its partners by all means necessary, including nuclear weapons. An American failure to respond in kind to North Korean nuclear use would plant seeds of doubt. Japanese and South Korean leaders could begin to question whether Washington would truly “trade Los Angeles for Tokyo or Seoul” if the stakes involved limited nuclear use rather than an existential threat to the United States.

That doubt could trigger cascading effects. Calls in Seoul’s National Assembly for indigenous nuclear weapons, expanded production of the Hyunmoo‑4 ballistic missile, and pressure on Tokyo to more seriously pursue nuclear sharing arrangements have already entered the political debate.

This concern is amplified by North Korea’s 2022 nuclear weapons law, which openly authorizes preemptive nuclear strikes in scenarios ranging from an imminent attack on leadership to undefined overwhelming crisis situations. Analysts note that the law’s language effectively lowers the threshold for nuclear use, implying tactical employment to repel invasion and seize the initiative in war. Rather than viewing nuclear use as a desperate last resort, Pyongyang now appears willing to employ such weapons early. For example, a low‑yield detonation against South Korean or American forward-deployed forces to shock Washington and Seoul into political concessions.

The challenge grows sharper in the event of a dual contingency: simultaneous crises on the Korean Peninsula and in the Taiwan Strait. Guardian Tiger II simulated such a scenario, with China launching a multi-domain assault on Taiwan while North Korea escalated on the peninsula. In such a real-world situation, US Indo-Pacific Command could be forced to divert the USS Ronald Reagan Carrier Strike Group from Yokosuka to the waters east of Taiwan, deploy B‑52H bombers to deter Chinese operations, and even consider repositioning some Terminal High Altitude Area Defense and Patriot missile defense batteries from South Korea to protect American assets in Okinawa and Guam.

Such shifts illustrate how a stretched American posture could reduce missile interception capacity on the peninsula and temporarily remove some nuclear-capable platforms from immediate Korean defense. North Korea could calculate that Washington, already balancing a larger confrontation with China, would avoid nuclear escalation in Korea to conserve resources and limit the risk of an all-out US-China war.

The political and strategic consequences would ripple across the region. In Seoul, public and elite opinion could shift sharply toward developing an independent nuclear arsenal—something 71 percent of South Koreans already support. South Korea’s nuclear latency, widely assessed by proliferation experts, suggests it could potentially produce a weapon in as little as 6 months if political consensus formed.

In Tokyo, the debate over counterstrike capabilities, missile defense expansion, and potential nuclear sharing with the United States would intensify, potentially accelerating deployment of Tomahawk missiles and further integration of F‑35A fighters, which, in the US fleet, are being certified for B61‑12 nuclear bombs, into allied defense planning. Beijing, meanwhile, could seize the opportunity to position itself as a stabilizing broker, offering to mediate between Seoul and Pyongyang while shielding the latter from full international accountability, further eroding American influence.

Avoiding nuclear escalation in a limited-strike scenario is understandable, but Washington cannot afford such a decision to be interpreted as weakness. Strengthening deterrence credibility in Northeast Asia will require more than declaratory statements. Clear and credible red lines for nuclear use must be communicated both publicly and privately. Integrated nuclear-conventional planning with allies should ensure that flexible response options, from proportionate nuclear strikes to overwhelming conventional retaliation, are executable on short notice. Contingency planning must explicitly account for simultaneous conflicts in Korea and Taiwan, with pre-positioned munitions, dispersed basing arrangements for nuclear-capable aircraft, and rotational deployments of dual-capable ships and submarines to maintain strategic presence even under force diversion.

Equally important is sustained alliance signaling. These include high-visibility joint exercises like the US-ROK Freedom Shield exercises, regular port visits by nuclear-capable submarines, and trilateral missile tracking drills with Japan. These measures reassure allies, complicate adversary calculations, and demonstrate that any nuclear use will incur unacceptable costs.

The Guardian Tiger exercises are valuable not because they predict the future, but because they reveal how quickly deterrence can fray in the fog of crisis. A single decision to refrain from nuclear retaliation, however understandable at the time, could reverberate for decades and reshape the strategic balance in East Asia. In the nuclear age, preserving deterrence means guarding against both uncontrolled escalation and the perceptions of hesitation that could invite it.

Dr. Ju Hyung Kim, President of the Security Management Institute, a defense think tank affiliated with the South Korean National Assembly, is currently adapting his doctoral dissertation, “Japan’s Security Contribution to South Korea, 1950 to 2023,” into a book.

A Nuclear Umbrella in Peril: Lessons from North Korea’s Escalation Scenarios was originally published on Global Security Review.

The war was not won by overwhelming force—it was won by precision, persistence, and a new kind of visibility. This shift was not just tactical; it was existential. Drones lowered the cost of engagement and shattered the old logic of deterrence. Military planners who once relied on large arsenals and conventional firepower now face a battlefield defined by bandwidth, optics, and algorithms. Nagorno-Karabakh was not an anomaly; it was a preview of what is coming.

Drones Tilt the Balance of Power

Azerbaijan’s drone fleet, led by Turkish-made Bayraktar TB2s and Israeli loitering munitions, did more than support ground troops. These drones destroyed tanks, artillery, and air defense systems with surgical precision.

Drone footage flooded social media and state television, galvanizing public support and intimidating adversaries. The battlefield became a stage and drones the lead actors in a performance of technological supremacy.

This was not a remote skirmish; it was a full-spectrum demonstration of how drones can tilt the military balance. Azerbaijan used converted Soviet-era aircraft as bait to expose Armenian air defenses, then struck with precision-guided drones. Air dominance was no longer reserved for wealthy superpowers; it was achieved through strategy and innovation.

Deterrence No Longer Works the Way It Used To

Deterrence did not fail for lack of firepower; it failed because the rules changed faster than anyone could adapt. Armenia’s conventional forces, built on Cold War assumptions, could not withstand the precision and persistence of drone strikes. The belief that large-scale military assets could prevent escalation collapsed under the weight of smaller and smarter systems.

This was not just a tactical failure; it was a conceptual one. Drones lowered the threshold for engagement and allowed Azerbaijan to strike decisively without risking pilots or exposing vulnerable assets. Deterrence, once rooted in overwhelming retaliation, now faces a new reality: speed, precision, and deniability.

Hybrid Warfare Is the New Normal

The war was not fought only in the skies; it unfolded across screens, networks, and supply chains. Azerbaijan blended conventional ground operations with cyber tactics, information warfare, and economic pressure. This hybrid model reflects a broader shift in twenty-first century warfare, where victory depends as much on narrative as on firepower.

Azerbaijan’s goals were clear: reclaim a contested enclave and secure vital energy corridors. But its drone-led offensive carried a deeper message—technological capability is political will. The signal to adversaries was unmistakable: resistance will be met with precision, persistence, and total visibility.

Small States Can Now Challenge Big Powers

            For Armenia, Nagorno-Karabakh represents cultural survival and historical identity. Its defense relied on asymmetrical tactics and guerrilla resilience. But against a technologically superior adversary, these methods faltered. Civilians and soldiers alike were left exposed, sheltering under skies that no longer offered cover.

This vulnerability is not unique to Armenia. Small states with access to drones can now challenge larger powers. Taiwan, for instance, is rapidly scaling up domestic drone production to counter China and support Western allies. Its “Drone National Team” initiative aims to produce 15,000 drones per month by 2028, positioning the island as a global hub for secure, AI-enabled drones.

Deterrence Must Be Reimagined

Nagorno-Karabakh may be the first war won by drones, but it will not be the last. The conflict offers a sobering lesson; deterrence must evolve or risk obsolescence. Integrated deterrence—blending military, economic, cyber, and diplomatic tools—is no longer optional. Unlike nuclear weapons, drones are accessible, scalable, and deniable. Their proliferation is horizontal, not vertical, spreading across small states, insurgent groups, and private firms.

As drone technology spreads, so does the risk of escalation, miscalculation, and asymmetric retaliation. The battlefield is no longer bound by geography; it is shaped by bandwidth, optics, and algorithmic intent.

Conclusion

            Nagorno-Karabakh was not just a battlefield; it was a turning point. It exposed how technological agility can dismantle legacy doctrines and how drones, once tactical novelties, now shape strategic outcomes. In this new era, deterrence is not about mass or might; it is about adaptability, integration, and speed. For nations still clinging to Cold War paradigms, the message is clear: evolve or be outmaneuvered. The future belongs to those who understand not just how to fight, but how to think in bandwidths, algorithms, and stories that shape the battlefield before the first shot is fired.

Evolution demands more than procurement; it requires imagination. Nations must rethink not only how they defend, but what they defend and why. As drones blur the line between war and surveillance, between deterrence and provocation, the strategist of tomorrow must be fluent in both geopolitics and code. The age of unmanned warfare is here and it is rewriting the rules faster than most doctrines can keep up.

Vikramaditya Shrivastava is a master’s student in international relations, security, and strategy at OP Jindal Global University.

Drones and the Death of Deterrence: Lessons from Nagorno-Karabakh was originally published on Global Security Review.

A new version, the Shahed-136B, is available for use in conflict. With an extended range of 4,000 kilometers, the increasing capability of Iran’s long-range drone raises important strategic questions as this weapon’s potential uses beyond Ukraine are considered. Consider Iran’s potential response to an American attack on its nuclear facilities, should the United States and Iran fail to reach an agreement that ends Iran’s nuclear weapons program.

Shahed-136 in the Russia-Ukraine War

Iran is supplying the Shahed-136 to Russia as supply of the drone is available. Russia often uses the drone to target Ukraine’s energy infrastructure and military positions. The design of this Shahed-136 allows it to bypass traditional air defense systems due to its low radar cross-section and ability to deploy in swarms—ensuring the drone will always get through, at least some portion.

Military officials in Ukraine and the West identified the Shahed-136 as a persistent and cost-effective threat capable of overwhelming advanced air defense systems. In the case of the Shahad-136, quantity has a quality all its own. Russia’s use of this drone is giving Iran valuable battlefield data that allows designers to refine and improve the capabilities of the Shahed-136B, which is proving an even more lethal weapon.

Strategic Implications in a US-Iran Conflict

If tensions between the US and Iran escalate—particularly if the US conducts strikes against Iran’s nuclear sites—the Shahed-136B could become a key component of Iran’s retaliation strategy. With a 4,000-kilometer range, the Shahad-136B has the potential to strike American strategic assets across the region. With a large American presence spread across the Middle East, there are a large number of Americans and military targets that would make inviting targets. Although the Shahed-136B does not have the legs to strike targets beyond Southern Europe and the Middle East, the number of American bases and assets within the drone’s striking radius are significant.

Iran may also try to launch attacks from unfriendly nations in the Western hemisphere like Cuba or Venezuela or even work with Mexican drug cartels. This proximity, should such an approach work, could allow for attacks on critical targets in the United States. Iran believes the United States is seeking regime change, which will lead the regime to see any fight as a fight for survival.

While military analysts can debate the effectiveness and impact of such a response, the psychological effect achieved is significant. Israelis, for example, live in constant fear of attack from the air. An American attack on Iranian nuclear facilities or other assets would surely elicit an Iranian attack from Iran’s most advanced capabilities.

Iran has a sophisticated network of asymmetric capabilities that extend across the Middle East and Europe. This means any direct confrontation with Tehran could lead to severe and unpredictable consequences for American security. Ensuring Iran does not field a nuclear weapon may be worth the risk of an Iranian response, but it is certainly unknown just how Iran may respond and how effectively the United States and its allies can limit the effect of any response.

Rather than pushing the region toward war, President Donald Trump, who presents himself as a pragmatic negotiator, should consider engaging Iran in constructive dialogue. Despite the difficulties in recent efforts by President Trump to work with the Iranian regime, a return to diplomacy could prevent a devastating conflict that neither side can afford.

Keep in mind, the regime in Tehran feels the United States is attempting to end the regime. The desire for nuclear weapons was spurred by American forces in Iraq, Iran’s western neighbor, and Afghanistan, Iran’s northern neighbor. Ratcheting down tensions will require an American effort to create a sense of security within the Iranian leadership.

While the Shahed-136B is not the only tool in Iran’s toolkit, it is an example of the growing capability fielded by Iran. It is also a strategic consideration for the United States. Iran is unlikely to let any attack go unanswered.

Mohammad Hassan Sangtarash is an independent defense analyst in Tehran.

Shahed-136: Iran’s Long-Range Drone and Its Potential Role in a US Conflict was originally published on Global Security Review.

Historically, adversaries, ranging from Imperial Japan to Saddam Hussein’s Iraq, badly miscalculated American resolve. This was, in part, because the US did not effectively communicate national will and the country’s ability to generate combat power.

While nuclear deterrence held during the Cold War, a worrisome erosion of America’s nuclear deterrence appears underway. A combination of unilateral cuts to the American arsenal, sluggish nuclear modernization, and “nuclear psychosis” (fear of one’s own nuclear arsenal) likely led Russian President Vladimir Putin to develop an escalate to win nuclear doctrine. The same factors may also contribute to China, Iran, North Korea, and Russia issuing mounting conventional and nuclear threats against the West.

Americans need to remember that escalation dominance is an essential ingredient in effectively maintaining deterrence of adversaries and assurance of allies. Escalation dominance means having the option to retaliate up or down the escalation ladder—at America’s choosing. This means developing and fielding capabilities that at least achieve parity, if not superiority, at each rung of the escalation ladder.

Without the US investing in the needed capabilities for full-spectrum conflict, all-domain escalation dominance, adversaries can study America’s capabilities and identify gaps. They can then develop and execute successful strategies that exploit those gaps. They can also incorrectly believe gaps exist, because of a failure of American messaging. Either way, American deterrence might fail.

The US once understood the art and science of escalation dominance—including how to weigh and manage uncertainties and unavoidable risks. At the most dangerous point in the Cold War, the Cuban Missile Crisis, the US out-thought, outmaneuvered, and overmatched the Soviet Union. Soviet Premier Nikita Khrushchev backed down. President Ronald Reagan successfully escalated an arms race while also waging economic warfare. The Soviet Union collapsed.

America now faces multiple adversaries it must engage across the spectrum of conflict. Both horizontal and vertical escalation are certain. With the potential for conflicts to start in the cyber or space domain, the United States must have the ability to limit damaging incursions and malicious interference, while out-escalating an adversary.

History shows that America’s enemies, whomever they might be, tend to be relentless, brutal, casualty acceptant, and even genocidal. Current events, in conflict zones around the world, prove that this has not changed. Appeasement is as ill-advised today as it was with Nazi Germany and Imperial Japan. Restraint is also as ill-advised now as it was then.

Sound theories of American victory need to be developed. Sound American strategy requires the proper matching of objectives to means. Without these in place, deterrence might not hold.

The stakes could not be higher. Conventional war is still almost always a prolonged and very bloody business, in which civilians are caught in the middle and have no safe refuge. If America’s strategic deterrence ever fails, the homeland might suffer devastating attack. Destruction in Ukraine is a small example of what such destruction could look like.

Nuclear war would likely prove unimaginably worse. Nuclear deterrence demands the ability to respond with proportional retaliatory strikes. It also requires the ability to match enemy escalation. The US cannot allow itself to be self-deterred by either a lack of will or a lack of capability. Self-deterrence is to give license to adversaries.

Yet some in the US continue to advocate for policies that eschew escalation at any cost.  This is a theory of defeat, not victory. Attempts to avoid risks only increase the cost of risk.

Such advocates need to be reminded that bullies will always test those they despise. Saving face and taking safe off-ramps are not a priority. For the US to be unable or unwilling to respond with sufficient force when necessary will only invite further and far worse aggression.

In the Cold War now underway, there is a danger of rapid escalation. To cede the military initiative to adversaries, to abandon America’s time-honored strategic culture of retaining full-spectrum escalation dominance, is to invite a nuclear strike against the nation and/or its allies. Adversary malign-influence campaigning is underway and now pervades American information.  Succumbing to these efforts to convince American society that isolation and pacifism are the nation’s best option is a mistake.

Appeasement never satisfies autocratic aggression. The United States must instead invest in the capabilities required to re-master the art and science of strong-stomached escalation dominance. This will support deterrence of America’s adversaries, assurance of America’s allies, and defense of the homeland. Now is the time to act.

Joe Buff is a Senior Fellow at the National Institute for Deterrence Studies. Views expressed in this article are the author’s own. 

Modern Escalation Dominance Is Essential to Effective Deterrence and Assurance was originally published on Global Security Review.