As a strategy, MAD was considered but jettisoned by the United States 65 years ago. For example, President John F. Kennedy noted, “Above all, while defending our own vital interests, nuclear powers must avert those confrontations which bring an adversary to a choice of either a humiliating retreat or a nuclear war. To adopt that kind of course in the nuclear age would be evidence only of the bankruptcy of our policy, or of a collective death-wish for the world.” Kennedy succeeded in adopting a strategy short of all-out retaliation that came to be known as “flexible response,” which, in 1974, was fully developed by James Schlesinger and eventually codified in Presidential Defense Directive 59.

Whether the United States has 10,000 or 1,500 strategic nuclear weapons, American forces were designed to have a secure retaliatory capability at any level of conflict. The objective was to end any conflict as soon as possible and at the lowest level of destruction. The American objective was not to burn an adversary’s cities to the ground. American deterrence strategy was to hold at risk what the adversary valued most.

Critics of current deterrence strategy assume that no nuclear-armed adversary of the United States believes in “fighting” a nuclear war. So, the US should drop its long-held deterrence strategy and go back to MAD or something like it. At the same time, many of these critics join nuclear abolitionists to support nuclear weapons but only to deter, not engage, in warfighting. If conflict breaks out and these weapons will not be used in retaliation, then nuclear forces are off the table and reduced to a bluff.

The mistaken notion that the US has a MAD strategy plays into the hands of Russia and China. These two nations both seek to escalate or threaten to escalate in a crisis or conflict with the limited use of nuclear weapons. The objective is to get the United States to stand down and not come to the defense of her allies, a restraint to give Russia and China a strategic advantage.

Unfortunately, much of the current commentary on nuclear threats still assumes the US and its adversaries maintain a mutually assured destruction strategy as the best means to avoid any use of nuclear weapons. Annie Jacobson’s recent book, On Nuclear War: A Scenario, describes a mutually assured destruction strategy, which she assumes the US maintains, as simply MAD or crazy. She posits that any initial use of nuclear weapons would almost automatically result in the all-out use of such weapons, leading to nuclear winter and killing billions. As such, she calls for the entirety of American nuclear deterrence to be jettisoned.

Being in the deterrence business, it is important for Congress, the media, the executive decisionmakers in the military and Department of Defense to fully understand what deterrence, as practiced by the United States, entails and why it must be sustained.

To explain this requires a review of history and an understanding that adversaries of the United States and the West sought military advantage through enhanced nuclear weapons technology. Over time the challenge for the US to sustain deterrence changed. The Soviets sought to put nuclear weapons in space, then built a huge first-strike missile force, then deployed thousands of medium-range SS-20s to intimidate and split NATO, and, most recently, built a theater-strike capability to keep the United States and NATO from winning the war in Ukraine.

The US nuclear deterrent was never one size fits all and automatically fit for purpose. For example, the US and NATO faced a huge conventional military threat from the Soviet Union from the beginning of the Cold War on the plains of central Europe, a place called the Fulda Gap. The Soviet and Warsaw Pact tanks were not matched by American conventional forces. President Dwight D. Eisenhower did not wish to bankrupt the US treasury by building such a large and costly conventional military. The available alternative was to establish a nuclear umbrella over Europe, primarily aimed at Soviet tank armies. Thus, in the initial Cold War period, the US assumed a nuclear conflict would most probably grow out of an initial conventional war.

As technology improved, however, a threat emerged that could markedly change the correlation of forces between the United States and the USSR. The US still sought to deter a potential Soviet push into central Europe, but an additional threat was a potential Soviet pre-emptive first strike seeking to eliminate much of the American extended deterrent, followed up by a subsequent conventional invasion of Europe.

In 1963, the American strategic nuclear deterrent consisted of 6,000 nuclear warheads while the Russians had 600 warheads. As President Kennedy remarked, this strength, and particularly the newly deployed Minuteman missiles, were “my ace in the hole” that gave the United States the strategic advantage that peacefully ended the Cuban Missile Crisis.

However, by the time the next decade ended, the 1972 Strategic Arms Limitation Talks (SALT) “arms control” treaty process was implemented and the USSR largely caught up, deploying 7,800 warheads compared to the US force of 8,700 warheads. Most worrisome was the new Soviet land-based missile force of 3,000 warheads on highly accurate SS-18s—with the overall Soviet nuclear force projected to grow to over 24,000 warheads by 1993.

As Secretary of Defense Melvin Laird told Congress in 1974, “the Soviets are going for a first strike force and there is no doubt about it.” The SS-18 eventually held at risk the entirety of the US land-based intercontinental ballistic missile (ICBM) force. This was the only American deterrent force that was sufficiently accurate to target key Soviet leadership and military targets without requiring “city busting.”

The US stopped deploying land-based missiles at 1,050 and associated warheads at around 2,000—assuming the USSR would show equal restraint. But Moscow built a huge land-based ICBM force that could take out the nation’s Minuteman missiles, leaving the US without the ability to hold key Soviet assets at risk. This perceived imbalance was known as the “window of vulnerability” where the US faced the prospects of a Soviet-initiated first strike that would leave US leaders exactly where President Kennedy worried it would.

The US solved the strategic equation of the window of vulnerability, the Soviet empire collapsed, the US added the Trident II D-5 submarine-launched ballistic missile and Peacekeeper land-based ICBM, Soviet SS-20s were banned, and the Strategic Arms Reduction Treaty (START) arms control process brought Russian warheads down to under 2,000.

In April 1999, Russian President Boris Yeltsin, economically unable to rebuild a Soviet-era nuclear force, decreed that Moscow develop highly accurate, small, low-yield, battlefield nuclear weapons, which his successor, Vladimir Putin, did in earnest. As former Vice Chairman of the Joint Chiefs of Staff General John Hyten warned, these theater nuclear weapons were designed to “escalate to win” a conventional conflict or crisis between Moscow and Washington.

Putin thinks the US will not respond to the small-scale use of nuclear weapons because the US will not want to risk escalation and the possibility of strategic nuclear exchange. That is why Putin made exactly these threats over NATO’s intervention in the war against Ukraine.

Both Russia and China assume the relative weak theater nuclear forces the US maintains are now insufficient to match escalatory threats from Moscow and possibly Beijing. This point was emphasized by the 2023 Strategic Posture Commission report in laying out the opening of a new window of vulnerability.

The US is indeed now developing a greater theater nuclear deterrent to close the technology gap. However, simply adding to America’s conventional deterrent is not sufficient. As military leadership has repeatedly emphasized, if adversarial nuclear forces are introduced into a conventional conflict, the American advantage ceases. In short, conventional military leverage disappears.

The central tenets of mutually assured destruction no longer apply. MAD was jettisoned long ago. More importantly, America’s adversaries employ credible threats with the nuclear forces. New technology and expanding adversary arsenals are undermining the limited deterrent value of the American nuclear arsenal, a fact that must change if the United States seeks to ensure it does not find itself embroiled in a conflict where capitulation or Armageddon are the nation’s only options.

Peter Huessy is a Senior Fellow at the National Institute for Deterrence Studies.

Mutually Assured Destruction was originally published on Global Security Review.

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.