President Donald Trump has repeatedly criticized U.S. European allies for their alleged failure to assume a larger share of the responsibility for NATO deterrence and defense. Although most U.S. angst about European burden sharing concerns preparedness for a larger conventional war on the continent, the sharing of risk with respect to nuclear escalation has received less attention. Past practice suggested that the American nuclear umbrella would suffice to deter Russian threats of nuclear escalation. On the other hand, Europe’s indigenous nuclear forces may have the potential to serve as a sufficient deterrent against Russian nuclear first use.

French “Forwardism”

In March 2026, French President Emmanuel Macron announced a doctrine of “forward deterrence” regarding the future of French nuclear declaratory and employment policy. His statements amounted to the most important shift in French nuclear posture in decades. The more important components of this policy change are as follows: First, France will increase the size of its nuclear deterrent force (force de dissuasion) for the first time since 1992. The assumption behind this move is that the current nuclear force is too small to deter aggression beyond France’s borders. Second, France would permit the temporary deployment of nuclear-armed aircraft to allied countries. However, France will not delegate nuclear employment authority to other countries. Stationing nuclear forces outside France will reinforce France’s commitment to its European partners. Third, France would work more closely with allies to develop shared understandings of the nature of the Russian threat and to coordinate on the management of escalation control in the context of a conventional war. The first stage of this collaboration will include visits to strategic sites and/or joint exercises with Germany, the UK, and other NATO countries.

Trump’s Frustrations

The decision taken by Macron reflects a perceived need for upgrading the proficiency of France’s nuclear deterrent. It also represents a political statement about his doubts regarding the U.S. commitment to NATO. Despite improvements in European defense readiness and preparedness, President Trump has continued to disparage NATO as weak and “free riding” on the backs of the U.S. military. Trump has announced that he plans to remove 5,000 American troops from Germany and has suggested that the U.S. should leave the alliance despite being prohibited by Congress from unilaterally doing so.

There are several prompts for this continuing cold shoulder from Washington to Brussels. First, Trump is frustrated by Putin and Zelensky and their inability to negotiate a cease-fire and peace agreement between Russia and Ukraine. Second, the U.S. President launched a pre-emptive combat operation against Iran on February 28, 2026, without either consulting or informing NATO allies before the fact. Understandably, in this regard, European leaders have been hesitant to provide military support, and some have refused to grant access to American bases or airspace for Operation Epic Fury, further frustrating President Trump. Third, the stalemate in the Strait of Hormuz has disrupted global supply chains and driven up the prices of fossil fuels and fertilizer worldwide.

European and U.S. Support for Ukraine

Despite distractions, NATO members remain committed to supporting Ukraine as long as needed. An agreement allows U.S. allies in Europe to buy weapons from the U.S. and pass them to Ukraine. The U.S. continues to upgrade its nuclear deterrent, especially the strategic nuclear triad, with a $71.4 billion FY27 plan for next-generation intercontinental ballistic missiles, ballistic missile submarines, strategic bombers with new Long Range Stand-Off (LRSO) missiles, and improved nuclear command and control.

It is doubtful that France’s nuclear force, which includes several hundred warheads with delivery systems such as submarine-launched ballistic missiles and both land- and sea-based aircraft, can replace the U.S. nuclear extended deterrent – nor was it meant to. Instead, France’s independent nuclear deterrence, designed to defend its own interests and sovereignty, along with the United Kingdom’s small ballistic missile submarine force, offers a minimal deterrent against nuclear threats from Russia at a level below strategic nuclear weapons.

Since the beginning of Russia’s war against Ukraine, Russian President Vladimir Putin has repeatedly reminded international audiences that Russia, under certain conditions of adversity in conventional war, might resort to nuclear first use of non-strategic or theater nuclear weapons (NSNW). These weapons, having shorter ranges and lower yields than strategic weapons, can be launched from land, sea, and airborne platforms and could number as many as 2,000 in Russia’s available inventory. In comparison, the U.S. deploys some 200 available NSNWs at several NATO bases.

U.S. Nuclear War Planning and NATO

This disparity in the number of NSNWs is not as alarming as it might seem because the nature of U.S. nuclear war planning has changed since the Cold War. Current U.S. operational plans include the full spectrum of nuclear and conventional kinetic and non-kinetic capabilities within one comprehensive plan. U.S. nuclear forces are expected to provide options for graduated escalation and flexible response. Toward that end, U.S. bomber deployments and military exercises provide additional support to U.S. European Command, bolstering NATO deterrence. In addition to the increased bomber presence, the Trump administration wants to add the flexibility of the nuclear sea-launched cruise missile (SLCM-N) for the deployment of weapons with variable yields. The purpose of SLCM-N is to deter limited nuclear use by adversaries and to provide reassurance to U.S. European and Asian allies.

France recognizes that deterrence is not only about the size of military forces, including nuclear arms, despite Macron’s plan to increase the number of French nuclear weapons. It also depends on perceived resolve among allies and potential adversaries. In Macron’s view, Russia should not expect that democratic Europe can be intimidated by threats of limited nuclear war because (in Russia’s mind) that threat is more realistic compared to strategic nuclear war. Nor should Russia expect that French support for NATO excludes the possibility of deploying French nuclear-capable launchers outside French national territory. French training exercises with NATO countries closer to Russia’s border will help send that message.

Conclusion

A more forward-leaning French military doctrine does not mean abandoning France’s commitment to European security. Nor does it replace the U.S. nuclear deterrent. Macron recognizes that, in defense matters, truth counts more than words: the United States cannot completely detach itself from NATO, nor can NATO sever its ties with America. NATO without the U.S. invites nuclear coercion upon Western Europe, while the U.S. without NATO risks political and military isolation instead of credible deterrence. The American and European pillars of NATO, as the French might say, are “condemned to succeed” together.

Stephen J. Cimbala is Distinguished Professor of Political Science at Penn State Brandywine and the author of numerous works on nuclear deterrence, arms control, and military strategy. He is a senior fellow at NIDS and a recent contributor to the Routledge Handbook of Soviet and Russian Military Studies edited by Dr. Alexander Hill (Routledge: 2025). The views of the author are his own.

Trump Wants NATO Allies to Step Up-Can France Lead the Way was originally published on Global Security Review.

That gap undermines American extended deterrence because Washington cannot reassure allies or deter aggressors without accounting for South Asia’s threat calculus. AI arms developments in this region stem from colonial legacies and mistrust of great power intentions, creating a volatile strategic environment.

India’s Governance Innovation in Defense AI

India’s governance model integrates civilian oversight with defense research and ensures ethical deployment of AI. The Responsible AI Certification Pilot evaluated algorithms for explainability before clearance. Its National Strategy for AI mandates ethical review boards for dual-use systems. Developers must document bias-mitigation measures and escalation pathways. Embedding accountability at design phase stabilizes deterrence signals by reducing inadvertent algorithmic behaviors.

The Evaluating Trustworthy AI (ETAI) Framework advances defense AI governance. It enforces five principles: reliability, security, transparency, fairness, privacy, and sets rigorous criteria for system assessment. Chief of Defense, Staff General Anil Chauhan, stressed resilience against adversarial attacks, highlighting the challenge of balancing effectiveness and safety. By mandating continuous validation against evolving threat scenarios, ETAI prevents mission creep and maintains operational integrity under stress.

India’s dual use by design philosophy embeds safeguards within prototypes from inception. This contrasts with reactive models that regulate AI after deployment. Civilian launch-authorization channels separate political intent from technical execution, ensuring decisions remain under human control and reinforcing credibility in crisis moments. Regular red-team exercises involving independent experts further validate system robustness and reduce risks of false positives in autonomous targeting.

Strengthening Extended Deterrence through Cooperation

US-India collaboration on AI verification can reinforce extended deterrence by aligning technical standards and testing protocols. The iCET fact sheet outlines secure information sharing and joint safety trials. Launched in January 2023, iCET has already enabled co-production of jet engines and transfer of advanced drone technologies. Building on this foundation, specialized working groups could develop common benchmarks for adversarial-resistance testing and automated anomaly detection.

A Center for Strategic and International Studies report recommends a trilateral verification cell blending American evaluation tools with India’s ethical reviews. Joint trials of autonomous air-defense algorithms would demonstrate interoperability and resolve. A shared “AI Red Flag” system would alert capitals to anomalous behaviors and reduce strategic surprise. Embedding cryptographically secure logging of decision path data ensures an immutable audit trail for post-event analysis and confidence building.

The INDUS-X initiative, launched during Prime Minister Narendra Modi’s 2023 US visit, integrates responsible AI principles into defense innovation. By aligning standards, both countries ensure AI systems enhance strategic stability rather than undermine it. Expanding INDUS-X to include scenario-based wargaming with allied partners can stress-test ethical frameworks and calibrate thresholds for human intervention under duress. This model can extend under the Quad framework, pressuring authoritarian regimes to adopt transparency measures.

Institutionalizing Global AI Arms Control

A formal arms control dialogue should adopt India’s baseline standards for ethical AI governance. The UNIDIR report calls for universal bias audits and incident-reporting obligations to prevent unintended escalation. Carnegie scholars propose a tiered certification process under a new protocol for autonomous systems within the Convention on Certain Conventional Weapons, requiring peer review of algorithms before deployment. Embedding such certification in national export-control regimes would create global incentives for adherence.

The UN General Assembly has established an Independent AI Scientific Panel and a Global Dialogue on AI Governance to issue annual assessments on risks and norms. This mechanism can evaluate military AI applications and recommend confidence-building measures. Procedural transparency would coexist with confidentiality requirements, balancing security with mutual reassurance. Regular joint workshops on risk-assessment methodologies can diffuse best practices and diffuse mistrust among major powers.

Regional Applications and Future Prospects

India’s responsible AI framework must inspire regional adoption and confidence-building measures. Pakistan and China should engage transparency initiatives to prevent dangerous asymmetries in AI capabilities. Proposed measures include joint research on AI safety, shared performance databases, and collaborative development of detection algorithms.

Successful tests of India’s hypersonic ET-LDHCM system, capable of Mach 8 and a 1,500-kilometer range, underscore the urgency of governance frameworks before fully autonomous weapons deploy. The Quad’s model of Indo-Pacific cooperation provides a template for multilateral norms on responsible AI in defense. Extending these norms to confidence-building measures such as pre-deployment notifications and automated backchannels can reduce the risk of inadvertent escalation.

Looking ahead to the United Nations General Assembly meeting on AI governance in September 2024, American policymakers can leverage India’s experience. Joint verification exercises and an ethical audit regime will establish global norms for military AI. Integrating lessons from ETAI and iCET into the assembly’s resolutions can produce enforceable standards that bind both democratic and authoritarian states. This approach will reaffirm American extended deterrence and help prevent destabilizing AI-driven arms races worldwide.

By demonstrating that ethical AI development strengthens rather than weakens deterrence credibility, India’s model provides both technical solutions and normative frameworks for managing the military applications of artificial intelligence. Sustained international cooperation on these principles is pivotal for securing strategic stability in a rapidly evolving technological landscape.

Vaibhav Chhimpa is a researcher who previously worked with the Department of Science & Technology (DST), India. Views expressed are the Author’s own.

The Artificial Intelligence (AI) Arms Race in South Asia was originally published on Global Security Review.

Prior to Russia’s invasion of Ukraine, Germany was one of Russia’s closest economic partners. At the outset of the war, Germany was criticized for its hesitant offer to Ukraine of 5,000 military helmets, at a time when other European states, especially the Baltic nations, were offering weapons and heavy military equipment to defend against the Russian invasion.

This hesitancy had two facets. First, the belief that military aid would escalate the war to unmanageable levels. Second, the fear that Russia could easily achieve its military objectives. In such a case, it was unwise for Germany to risk its economic interests, particularly its heavy reliance on Russian natural gas.

However, Germany, later, began supplying weapons and other military aid to Ukraine under domestic and international pressures. Later, Germany even supplied heavy military equipment to Ukraine. As of August 2025, Germany is one of the largest suppliers of military aid, amounting to $47 billion worth. This includes air-defense systems, advanced drones, and heavy artillery. German action illustrates how incremental support erodes Russia’s nuclear red lines.

Incremental Steps Eroding the Threshold 

In the Russian conceptualization of deterrence, strategic deterrence (strategicheskoye sderzhivaniye), both nuclear and conventional deterrence merge into one holistically integrated framework. The threat of or actual use of nuclear weapons would deter a conventional attack on Russia, help achieve military objectives, prevent third parties from entering a war, and help de-escalate a war. In the 1990s, when Russia fielded a conventionally inferior armed force, it relied primarily on nuclear deterrence for its security.

However, a nuclear-deterrence-focused security strategy does not consider the erosion of thresholds owing to incremental changes during war (i.e., incremental changes test interwar and intrawar deterrence). After Pakistan became a nuclear power, Pakistan employed sub-threshold tactics (terrorism) against India, assuming that the fear of mutual nuclear vulnerability would prevent India from using kinetic means in retaliation. However, this approach failed when India employed conventional force against Pakistan in 2016, 2019, and, more prominently, in Operation Sindoor (2025). Similarly, Ukraine challenged Russia with its aggressive attacks in response to Russian invasion.

Russia’s updated nuclear doctrine (2024) brought the threshold of nuclear employment to an even lower level than earlier doctrine. This includes “actions by an adversary affecting elements of critically important state or military infrastructure” and “the massive launch […] of air and space attacks means (strategic and tactical aircraft, cruise missiles, unmanned, hypersonic and other aerial vehicles).”

Ukraine’s Operation Spyder Web crossed these “nuclear thresholds” set in the 2024 doctrine. Russia’s numerous threats of tactical nuclear weapons use are not taken seriously by Europe any longer. This creates a stability-instability paradox where “conventional balances also reduce the credibility of nuclear threats precisely because there is a conventional alternative to resorting to nuclear weapons.”

One of the implications of the stability-instability paradox in international relations is that while nuclear weapons create stability at the strategic level by deterring large-scale war between nuclear-armed states, they increase the likelihood of smaller, limited, or conventional conflicts. This is reinforced in the Ukraine conflict, where Russia simply cannot use nuclear weapons to deter third-party military help to Ukraine and Ukraine’s counteroffensives.

Nuclear deterrence has limitations and does not deter incremental or conventional actions of lower yields. The costs associated with utilizing nuclear weapons for deterring incremental erosion of thresholds is unimaginable. It is difficult for parties in a war to agree upon thresholds. Thus, resorting to conventional attacks rather than escalating to nuclear use becomes more likely, even after crossing stated red lines. 

States Should Build on That 

For that matter, those states looking to augment their defence preparedness should invest in conventional deterrence capabilities that can guarantee security. This goes beyond just building missile and air-defense systems of a high calibre. Conventional deterrence is not merely about weapons to deter an adversary.

Military thinking needs to go beyond just inventing new weapons and focus on military strategy. States need to go beyond a one-size-fits-all understanding of deterrence, where all states subscribe to the same benchmarks, variables, and conceptualization of deterrence, and have a shared sense of it. Situating deterrence within the fold of strategic culture, how a state’s strategic culture shapes deterrence, is more helpful. For instance, in contrast to the denial versus punishment typology, Russia uses the forceful versus non-forceful scheme for deterrence.

States may need to invest in the re-invention of military doctrines, strategy, and thinking to suit current challenges. It is worth studying how adversaries see the concept of deterrence. It confers two advantages. First, it helps one remain prepared for any incremental utilization of force under the fear of mutual destruction. Second, it allows the defender to assess the opponent’s risk-taking appetite and nuclear threshold in a war. This would confer advantages associated with effectively using conventional means.

At the same time, both parties need to be aware of over-extension, where a misguided action can cause a catastrophic nuclear exchange. Since agreeing on the same trigger point is subjective and difficult, states must study the pace, timing, and intensity of the use of non-nuclear forces to effectively achieve objectives without jumping to the nuclear step on an escalatory ladder.

In the end, preventing nuclear war is critical. Thus, understanding thresholds is important. If war is unlikely to end, ensuring it does not escalate to nuclear use should be a top priority.

Anshu Kumar is a Junior Research Fellow at the Centre for Russian & Central Asian Studies, Jawaharlal Nehru University, New Delhi.

The Russia-Ukraine Conflict Showcases the Limits of Nuclear Deterrence was originally published on Global Security Review.