The Indo-Pacific is entering a far more dangerous strategic era. Military modernization, grey-zone coercion, and rapid nuclear expansion are reshaping the regional balance of power. Most notably, China is undertaking a historic expansion of its nuclear arsenal, investing in silo fields, road-mobile intercontinental ballistic missiles, ballistic missile submarines, and dual-capable systems. Simultaneously, Russia’s willingness to use nuclear threats in Europe demonstrates that nuclear coercion is once again central to great-power competition.

In Washington, proposals such as Ely Ratner’s Pacific Defense Pact reflect recognition that the current security architecture is insufficient. A more formalized collective defense structure in the Indo-Pacific is necessary.

However, this is not sufficient. A conventional Pacific Defense Pact does not fully address the most dangerous level of escalation to large-scale conventional war or nuclear attack. What the region now requires is a narrowly defined Indo-Pacific nuclear alliance.

A Narrow, Explicit Purpose

This would not be a sweeping defense pact covering every maritime incident, border clash, cyber intrusion, or grey-zone coercive act. It would have a clear and carefully delimited purpose. That is to deter large-scale conventional war or nuclear attack against member states.

Its clarity would be its strength. That clarity performs a second vital function. It minimizes the risk of entrapment by ensuring member states are not dragged into escalation over actions below the threshold of war. By explicitly excluding grey-zone coercion and limited crises from its nuclear remit, the alliance would reassure leaders that only truly existential threats trigger its highest-level commitments.

Participation becomes politically sustainable and strategically credible because it avoids automatic escalation over incremental provocations. The alliance would draw a line at catastrophic strategic aggression.

The Historical Record: Why Nuclear Deterrence Matters

The case for a nuclear alliance is not theoretical. It is grounded in historical experience. During the Cold War, nuclear parity between the United States and the Soviet Union prevented direct large-scale war and nuclear attack in Europe. Despite ideological confrontation and proxy conflicts, neither side attempted a conventional war or nuclear attack on the other’s core territories. Nuclear weapons imposed restraint. They deterred not just nuclear use, but overwhelming conventional assault.

Similarly, within NATO, the presence of U.S. nuclear guarantees has prevented full-scale Russian conventional attack on Alliance territory. Moscow has tested boundaries through

hybrid tactics and coercive signaling, but it has not launched a large-scale attack on NATO soil. Nuclear deterrence at the alliance level raised the costs to an unacceptable threshold.

The 1969 Sino-Soviet border conflict further illustrates how nuclear capability constrains escalation. The Soviet Union’s nuclear superiority allowed it to signal credible threats, while China’s emerging nuclear capability and mobilization signaled resolve. Mutual fear of escalation compelled negotiation, including intervention through U.S. triangular diplomacy. Nuclear weapons shaped behaviors without being used.

The India–Pakistan experience is equally instructive. Prior to overt nuclearization, the two states fought multiple full-scale wars. Since their nuclear tests in 1998, crises have erupted, but they have remained limited. Missile strikes, cross-border skirmishes, and periods of great tension have not escalated into all-out conventional war or nuclear attack. Nuclear deterrence imposed a ceiling on the conflicts.

Contrast this with the Russia–Ukraine war. Ukraine relinquished its nuclear arsenal in the 1990s and now confronts a nuclear-armed Russia without possessing its own nuclear deterrent. The result has been a prolonged and costly conventional war of attrition. The absence of mutual nuclear deterrence has made sustained large-scale conventional war possible. By comparison, Russia has not launched a direct assault on NATO territory precisely because nuclear deterrence underwrites NATO’s collective defense.

The pattern is clear. Where credible nuclear deterrence exists between adversaries, large-scale conventional war and nuclear attack is sharply constrained or avoided. Where it does not, prolonged and devastating large-scale conventional war and nuclear attack becomes more likely.

The Indo-Pacific Strategic Gap

The Indo-Pacific currently relies on a patchwork of bilateral extended deterrence arrangements centered primarily on Washington. These remain essential, but they are increasingly strained or at risk of being fractured by China.

China’s expanding nuclear arsenal complicates escalation management. A larger and more survivable force reduces the credibility of assumptions that escalation will remain controlled or asymmetrical. Meanwhile, the region contains multiple flashpoints, including Taiwan, the South China Sea, the Korean Peninsula, and the India–China border where conventional conflict could rapidly climb the escalation ladder.

Frameworks like AUKUS and the Quad strengthen capabilities and coordination, while the proposed Pacific Defense Pact aims to guarantee that the U.S. and its allies can act in concert during crises or conflicts. But they are not structured as nuclear deterrence mechanisms. They do not institutionalize shared nuclear declaratory policy, crisis consultation at the strategic level, or joint planning for high-end escalation management. A nuclear alliance would fill that gap.

Beyond a Pacific Defense Pact

A Pacific Defense Pact, as envisioned in conventional terms, strengthens interoperability and signals unity. But without an explicit nuclear dimension, it leaves ambiguity at the highest rung of escalation. That ambiguity can invite miscalculation.

A nuclear alliance would not broaden commitments; it would sharpen them. It would: (1) establish shared declaratory policy on deterrence of large-scale war and nuclear attack, (2) institutionalize strategic consultation mechanisms during crises, (3) coordinate planning to ensure credible escalation management, and (4) reinforce extended deterrence while discouraging independent nuclear proliferation.

Importantly, such an alliance need not require additional states to acquire nuclear weapons. Like NATO, it could rely on extended deterrence commitments and nuclear-sharing with structured burden-sharing and planning arrangements. Nuclear forces may remain nationally controlled, but alliance cohesion amplifies deterrent credibility. 

Clarity as Stability

The objective is not confrontation. It is clarity. By defining a narrow and explicit threshold—large-scale conventional war or nuclear attack—the alliance reduces the risk of catastrophic miscalculation. It signals to potential aggressors that existential aggression will trigger unified strategic consequences.

Simultaneously, it reassures members that lower-level competition will not automatically escalate to nuclear commitments. This dual clarity strengthens deterrence at the top end and stabilizes politics at the lower end.

A Necessary Evolution

The Indo-Pacific is now the central arena of 21st-century strategic competition. Nuclear modernization is accelerating. Multi-nuclear dynamics are emerging. Escalation timelines are compressing.

History shows that nuclear weapons, and when embedded within credible alliance structures, deter catastrophic war. They prevent large-scale conventional war and nuclear attacks not because they are desirable tools of war, but because they impose unacceptable costs on those who contemplate it.

A Pacific Defense Pact is a step forward, but in the current strategic environment, it is not enough. To deter large-scale conventional war and nuclear attack in the Indo-Pacific, the region must move beyond a Pacific Defense Pact. It must build a nuclear alliance.

Natalie Treloar is the Australian Company Director of Alpha-India Consultancy, a Senior Fellow at the Indo-Pacific Studies Center (IPSC), a Senior Analyst at the National Institute for Deterrence Studies (NIDS), and a member of the Open Nuclear Network. Views expressed in this article are the author’s own.

Beyond a Pacific Defense Pact: Why the Indo-Pacific Requires a Nuclear Alliance was originally published on Global Security Review.

Russia’s January 2026 use of a hypersonic Oreshnik missile was not primarily about destroying a target. It was a strategic message delivered through speed and proximity rather than words. Western reporting confirms the strike occurred near Ukraine’s western border during a broader missile and drone attack and was widely interpreted as a deliberate signal toward NATO rather than a battlefield necessity.

This is how the conversation begins. Russia speaks first, not with a declaration, but with a capability demonstration. Hypersonic systems like Oreshnik reportedly exceed Mach 10, compressing detection and decision timelines and complicating interception by existing missile defense architectures. The message is implicit. If this can reach here, it can reach farther. Geography does the rest of the work.

From a battlefield perspective, the strike changed little. Ukraine has endured far heavier damage from conventional missile campaigns. Infrastructure effects were limited relative to scale. That is precisely why the strike matters. Hypersonic weapons derive much of their value not from explosive yield but from psychological and strategic effects that shape decision-making under uncertainty.

Hypersonic systems sit in an uneasy space between conventional and nuclear deterrence. Their speed and maneuverability reduce warning time, while their dual-use potential introduces ambiguity about intent and escalation thresholds. This ambiguity is destabilizing by design. It forces worst-case assumptions and heightens coercive leverage without crossing overt nuclear red lines.

The timing of the strike matters. It occurred amid active European debates about long-term security guarantees for Ukraine. Russia has consistently opposed deeper Western involvement, and analysts note that demonstrations of advanced strike capabilities often coincide with diplomatic inflection points to influence allied decision-making. Poland was not targeted, yet proximity alone conveyed risk. That was sufficient.

This brings the conversation directly to deterrence and national strategy. The most recent United States National Defense Strategy identifies Russia as an acute threat and emphasizes integrated deterrence across domains, allies, and instruments of national power. The document explicitly recognizes the challenge posed by advanced missile threats and highlights the need for resilient command and control, integrated air and missile defense, and close coordination with allies.

However, the Oreshnik strike exposes a gap between strategic acknowledgment and operational specificity. The National Defense Strategy speaks clearly about the importance of integrated deterrence, yet it remains largely high-level in addressing how compressed decision timelines created by hypersonic weapons affect escalation management in Europe. While the strategy calls for investments in missile defense and sensing, it does not fully grapple with the psychological and political effects of hypersonic ambiguity on alliance cohesion crises.

Deterrence by denial becomes harder to sustain when allies know that some threats may penetrate defenses regardless of investment. Hypersonic systems challenge assumptions that reassurance can rest on interception alone. NATO and U.S. strategies increasingly emphasize deterrence by punishment and resilience, yet the National Defense Strategy stops short of articulating how allies should respond politically and militarily when warning time collapses, and attribution is immediate, but intent remains unclear.

This does not mean the strategy is wrong. It means it is incomplete. Integrated deterrence remains the correct framework, but hypersonic weapons demand greater emphasis on crisis decision-making, distributed command structures, and alliance-level exercises that assume ambiguity rather than clarity. Analysts have long warned that hypersonic systems stress deterrence not by making war more likely, but by increasing the risk of miscalculation during moments of political tension.

Russia’s hypersonic signal near NATO’s border, therefore, becomes a practical test of whether strategic documents translate into a credible posture. The National Defense Strategy acknowledges the problem. The question is whether implementation moves fast enough to match the physics involved. Deterrence must function even when seconds replace minutes, and ambiguity replaces certainty.

The Oreshnik launch did not redraw Europe’s security map overnight. It changed the tone of the room. It reminded policymakers that deterrence is not static, and that technology can erode comfortable assumptions faster than doctrine adapts. Hypersonic weapons are not the end of deterrence. They are a stress test of whether national strategies and alliances can remain credible when clarity disappears.

When the screens go dark in that briefing room, the real discussion begins. Not about panic or retaliation, but about adaptation. Deterrence endures not because threats are fast, but because responses remain coherent under pressure. Russia spoke in velocity. The enduring question is whether strategy, alliance resolve, and execution can keep pace.

Brandon Toliver is a Senior Fellow at the National Institute for Deterrence Studies. Views expressed are the author’s own. 

The Conversation Europe Never Wanted: Hypersonic Tensions and U.S. Defense Strategy was originally published on Global Security Review.