Their low cost, flexibility, and ability to operate without putting human pilots at risk make drones increasingly valuable in conventional military conflicts. Their capabilities already include reconnaissance and surveillance, long-range strike missions, electronic warfare, and precision killing.

With their precision-targeting ability, drones can be integrated into nuclear deterrence strategies. For instance, they could be used to ensure the survivability of a country’s nuclear forces by providing continuous surveillance and early warning against potential nuclear threats. Drones could also support a more viable second-strike capability, potentially increasing the credibility of nuclear deterrence by ensuring that a country retains a means to retaliate even after a nuclear first strike.

The use of drones in situations where nuclear escalation is a possibility could lead to unintended consequences. The increasing autonomy of drones raises the risk of misinterpretation, as drones could be perceived as a precursor to a larger attack, even when they are only conducting reconnaissance. This could trigger a preemptive nuclear strike by an adversary, leading to an inadvertent escalation into full-scale nuclear war. Cold War and subsequent histories show that the danger of inadvertent nuclear escalation is not trivial.

The possibility that expansion of the war in Ukraine from conventional weapons into nuclear first use could occur from Russian views of Ukrainian deep strikes into Russian territory, with NATO ballistic and cruise missiles, provides one example of concerns in this category.  Lewis A. Dunn suggests that President Donald Trump is faced with a world sliding into nuclear anarchy. He writes:

Brinkmanship among major nuclear powers is rising. China is relentlessly expanding its nuclear forces but rejecting serious engagement with the United States on arms control. US–Russia cooperation on nuclear matters, already in a dire state, has deteriorated further with President Vladimir Putin’s repeated nuclear threats in the course of Russia’s war in Ukraine. Recent reports based on information from senior US officials indicate that the United States, too, could modify its posture and expand its arsenal to strengthen deterrence of coordinated Russian, Chinese, and North Korean nuclear adventurism. All these developments have eroded critical pillars of nuclear order and raised the risk of nuclear warfare.

Drones are relatively fast, low-cost, and difficult to detect, which makes them ideal for preemptive strikes against high-value targets. In theory, a nation could deploy a drone strike against an adversary’s nuclear command-and-control infrastructure or missile silos, aiming to disrupt or neutralize a potential nuclear retaliation before it can be launched. In addition, drones equipped with nuclear payloads or advanced conventional weapons could be used as part of a disarming strike. The ability to carry out such strikes could shift the strategic calculations of nations, as adversaries might feel more vulnerable to a preemptive attack, especially if they believe their nuclear retaliation capabilities could be neutralized by fast-moving drone strikes.

As drones become more autonomous, the risk of them making decisions without human oversight increases. In a nuclear context, where the consequences of any action are catastrophic, the delegation of decision-making to machines is highly controversial. The potential for autonomous drones to trigger a nuclear response or make fatal miscalculations due to algorithmic errors presents a possible threat to strategic stability.

Given that drones can operate autonomously, one challenge is ensuring that their actions do not trigger unintended escalation. Moreover, the reliance on technological systems for communication and control in a nuclear context raises concerns about vulnerabilities in these systems, especially if adversaries employ cyberattacks or electronic warfare tactics to disrupt drone operations.

Future generations of drones will interact with artificial intelligence that also supports other elements in the matrix of deterrence and defense. AI will privilege deterrence by denial compared to deterrence by credible threat of unacceptable retaliation. It will do so because states will have to quickly manage the deterrence and/or conduct conflicts in multiple domains: land, sea, air, space, cyberspace, and the information or knowledge domain. The knowledge domain wraps around all the others. It is the “gnostic center” that controls, connects, and prioritizes among the component parts of the various domains in order to provide for the correct response to threats or attacks.

AI-assisted attacks on the gnostic center will require immediate responses by AI-assisted defenses that can defeat or diminish the cost of those attacks. Absorbing the first blow and then retaliating may not be a choice that is available to beleaguered and time-pressed decision-makers. This situation poses an especially concerning challenge for nuclear deterrence. Decisions for or against nuclear war should allow policymakers sufficient time to deliberate alternatives with their advisors and to select the most appropriate option for the exigent circumstances. But the potential speed of AI-boosted attacks against space and cyber assets, together with the rising speed of kinetic strikes from hypersonic weapons, may leave leaders fearful of an enemy nuclear first strike to choose preemption instead of retaliation.

Just as we can conceive of drones as reconnaissance and strike platforms for offenses, it is also possible that drones can be part of any state’s comprehensive antimissile and air defense plan. One illustration is the use of drone swarms to defeat attacking drones tasked with reconnaissance or strike missions. Another example would be the use of drones for electromagnetic “hit to kill” within the atmosphere or, even more ambitiously, in midcourse intercept against attacking ballistic missile forces. Drones based on one or more lunar spaceports could protect American interests in cislunar space.

Futuristic drones with embedded AI and space-to-space weapons could defend orbital satellites against attack (so-called DSATs) or engage another state’s satellites that appear threatening (ASATs). Priority DSATs and ASATs would deter or defend against any threat to the viability of American satellites for warning and assessment; command, control, and communications; geolocation; and other missions.

Comparatively inexpensive drones could thus take over some of the strategic defense burden, otherwise requiring both upgraded terrestrial missile launchers and kill vehicles or, eventually, sophisticated ballistic missile defenses based on space-to-earth weapons such as lasers or particle beams. Future planners should expect a more crowded space domain, including newer generations of orbital satellites with diverse missions, space stations, and additional reconnaissance and strike weapons along with smarter drones and larger swarms.

The preceding discussion about drones and their possible relationship to nuclear deterrence has implications for nuclear arms control. It is important for a peace agreement to terminate the war in Ukraine for many reasons. One reason is so that the United States and Russia can resume negotiations about an arms control regime to succeed the New START agreement, due to expire in 2026.

The “beyond New START” consultations should include discussions about the two states’ arsenals of non-strategic nuclear weapons and protocols for nuclear first use. Vladimir Putin’s repeated warnings about the possibility of Russian nuclear first use in Ukraine is dismissed by some as bluffing for effect, a form of coercive diplomacy. On the other hand, Russia’s doctrinal shifts appear to move toward a more permissive standard as the war continues. In addition to clarifying this matter, the United States and Russia must acknowledge that China is an aspiring nuclear peer and include China in discussions about nuclear policy issues, including transparency about force structures and military doctrines. China is unlikely to be interested in arms reductions per se, but dialogue should be initiated at the expert level to clarify China’s thinking about strategy, arms control, and related issues.

The character of war changes with the advent of new technologies and strategic thinking.  But the nature of war is perennially the environment of competition and conflict, uncertainty, chance, and friction. The relationship between drones and nuclear deterrence represents a mixed blessing for military planners and arms control. Drones have the potential to enhance nuclear deterrence, but they also introduce significant risks in terms of escalation control and first-strike stability. As drone technology advances, it will be critical for policymakers to develop strategies that account for the unique challenges drones pose in nuclear deterrence and, as well, their future roles in space and cyber wars.

Professor Stephen Cimbala, PhD, is a Senior Fellow at the National Institute for Deterrence Studies.

Nuclear Deterrence and Drones: An Unpredictable Mix? was originally published on Global Security Review.

A decade ago, Paul Bracken warned of such possibilities in his book, The Second Nuclear Age. Because deterrence theory went out of vogue for so long in the West, analysts are now woefully unprepared to think about these challenges and their implications. Today, all possible threats to our Western notions of peace and stability have been jumbled into one giant intellectual recycling bin of deterrence theory. It is time to talk much more seriously about (1) the role of nuclear weapons in deterrence and (2) the role of nuclear deterrence in a new era of nuclear disorder in the Asia-Pacific.

Nuclear weapons play a unique and unprecedented role in how nations think about geopolitical order. They have fundamentally altered how countries think about alliances and the nature of international order. William Walker wrote about the establishment, in the late 1960s, of a nuclear order based on managed systems of deterrence and abstinence. The former was a system “whereby a recognized set of states would continue using nuclear weapons to prevent war and maintain stability, but in a manner that was increasingly controlled and rule-bound,” and in which there was a degree of familiarity in essentially dyadic deterrence relationships.

Nuclear abstinence consisted of a system “whereby other states give up sovereign rights to develop, hold, and use such weapons in return for economic, security, and other benefits,” concomitantly with the provision of nuclear umbrellas and a stable Nuclear Non-proliferation Treaty (NPT). It is a system whereby not only the possession, but also the use of nuclear weapons is controlled. According to Walker, the stability and robustness of these two systems would provide the rationale for many states in the international system to abstain from acquiring weapons and for states to rely on the US for their national survival.

There are several elements that gradually developed after the second world war that characterized this nuclear order—dissuading countries from developing nuclear weapons. First, the number of nuclear weapon states is relatively small. Second, nuclear weapons are no longer considered merely bigger and better conventional weapons. Third, there are strong norms against possession and the use of nuclear weapons. Fourth, there are no direct and immediate military threats to US allies. Fifth, war between major powers is relatively unlikely.

This and the prospects for nuclear proliferation are relatively limited. The Nuclear Non-proliferation Treaty (NPT) proposed in the late 1960s eventually attract more and more states, thus contributing to a norm against nuclear proliferation. It also contributed to nuclear and conventional arms control as concepts and policies in the international community. The world was able to more easily navigate crises and confrontations as thinking evolved about strategic theory and concepts and their application to real world politics and diplomacy.

The international (nuclear) order held together. It is now slowly eroding. China is modernizing its conventional and nuclear forces, all while growing increasingly bellicose and regularly threatening to invade Taiwan.

Russia annexed Crimea in 2014. The West did nothing and never imagined this would be followed by a full-scale invasion eight years later—with regular Russian threats to use nuclear weapons.

Now, Australian academic Peter Layton is writing about “this nuclear threat business.” Until recently, this behavior was reserved for rogue states like North Korea. Such behavior was beneath great powers such as Russia and the United States. Not only does the West have to think about deterrence in a multipolar setting, but it must face nuclear dictators.

Nuclear arsenals in Asia are also expanding. From China’s rapid nuclear expansion to questions about the future of Pakistan’s nuclear posture, the future is uncertain. There are renewed questions about the future of South Korea and nuclear weapons.

Arms control is also breaking down. Much to the chagrin of arms control careerists, who argue for unilateral, bilateral, and trilateral nuclear arms control as a public good sui generis, arms control is not carrying the day. Bereft of the intellectual foundations of deterrence that guided impressive negotiations in SALT I and II, and even START I, discussing nuclear strategy is now taboo in the West.

The nuclear order that existed during the Cold War and the post–Cold War peace dividend, especially in the Asia-Pacific, is eroding rapidly. For many nuclear historians, this trend is not new. Now is the time to grieve the loss of the utopian dream and think seriously about how to navigate this new era of disorder and the role of nuclear weapons in deterring war and promoting peace.

Christine Leah, PhD, is a Fellow at the National Institute for Deterrence Studies. Views expressed in this article are the author’s own. 

Nuclear Order and Disorder in the Asia-Pacific was originally published on Global Security Review.