# Valiant Shield 2026 Ends With a Symbolic Sinking in the Pacific > Introduction: ten days that redraw allied power in the Pacific - Author: Maxime Marquette - Publisher: MadMax (https://mad-max.co) - Section: Reportage - Published: 2026-07-04 - Canonical URL: https://mad-max.co/en/article/lexercice-valiant-shield-2026-sacheve-par-un-naufrage-symbolique-dans-le-pacifique ## Key takeaways - The exercise ran from June 22 to July 1, 2026, with the United States, Japan, Australia, Canada and New Zealand around Guam and the Northern Mariana Islands. - It included anti-submarine warfare, a high-altitude balloon launch, an MQ-28 Ghost Bat test flight, and a live-fire test of the MRIC missile defense system derived from Iron Dome. - A Japanese submarine fired the opening torpedo, followed by Harpoon missiles from New Zealand and Australian-coordinated P-8A aircraft and an LRASM from a US B-2 bomber. - The ship's name echoed the first USS Juneau, sunk by a Japanese torpedo in 1942, a contrast the author links to the transformation of US-Japan relations. - The author argues the exercise reinforces deterrence against China, while noting no official statement names China as the target. ## Introduction: ten days that redraw allied power in the Pacific ### A coordinated show of force On **July 1, 2026**, the **United States** and its **allied partners** officially concluded exercise **Valiant Shield 2026**, ten days of intensive military training in the **Indo-Pacific**, according to **USNI News**. This biennial exercise, launched on **June 22**, brought together the armed forces of the **United States**, **Japan**, **Australia**, **Canada**, and **New Zealand** around the **Northern Mariana Islands**, **Guam**, and the surrounding waters. This is no mere routine exercise. It is a **concrete demonstration** of the ability of **allied democracies** to operate together, in a coordinated fashion, in a region where **China** has escalated military provocations for several years. ### A spectacular climax The most striking moment of the exercise was the deliberate sinking of the **USS Juneau**, a former **Austin**-class **amphibious transport**, now retired from active service. Struck successively by a **torpedo** and several **missiles** fired by allied forces, the ship sank more than **200 nautical miles** off **Guam**, in the **Philippine Sea**. This operation, called a **SINKEX** (sinking exercise), is the traditional highlight of **Valiant Shield** and allows allied forces to test in real-world conditions capabilities that **"no simulator can fully replicate,"** according to the **US Navy** statement cited by **USNI News**. *Watching five Pacific democracies coordinate a joint strike on a decommissioned ship is not a trivial thing in today's geopolitical climate. It's a clear message to anyone who doubts Western cohesion in this part of the world.* *And that message isn't aimed only at Beijing: it also reassures the smaller Pacific nations that rely on this allied presence for their own security.* ## How the Valiant Shield Exercise Unfolded ### Ten days of multi-domain maneuvers According to **USNI News**, the exercise included a **trilateral anti-submarine warfare** component, the launch of a **high-altitude balloon**, a test flight of the **MQ-28 Ghost Bat drone**, **bilateral medical operations**, as well as **cross-replenishment** and **expeditionary reload** exercises. All of these maneuvers were aimed at strengthening **operational integration** between US forces and those of their partners, in **contested, realistic environments**, according to the naval statement reported by **USNI News**. ### The MRIC system test, a notable first The exercise also included a live-fire test of the **MRIC** (Medium-Range Intercept Capability), a **missile defense** system derived from **Israel's Iron Dome** and its **Tamir** interceptor. This test demonstrates the growing integration of combat-proven defense technologies into the US arsenal deployed in the **Indo-Pacific**. This type of capability, originally designed to intercept short-range rockets, illustrates the ongoing adaptation of US forces to the growing range of threats in the region, from **drones** to **cruise missiles**. *Seeing a system born from Israeli missile defense tested in the heart of the Pacific shows just how much Western alliances, even geographically distant ones, feed off each other's defense innovations.* ## The Sinking of the USS Juneau, Minute by Minute ### A Japanese strike opens the attack According to **Navy Times**, the finishing blow came from a **torpedo** fired by a **Japan Maritime Self-Defense Force submarine** on **June 27, 2026**. **Rear Admiral Eric Anduze**, commander of **Carrier Strike Group 5** and **Task Force 70**, called this SINKEX an **"exceptional opportunity"** to integrate joint capabilities in the Pacific theater. The choice to hand the opening strike to **Japanese** forces is no small detail: it underscores the central place **Tokyo** now occupies in the region's **collective defense** architecture, alongside **Washington**. ### A multinational final salvo According to **USNI News**, the **Royal New Zealand Air Force** then fired two **Harpoon missiles** from a **P-8A Poseidon** aircraft, in coordination with an **Australian** aircraft and two **American** aircraft of the same type. A **B-2 Spirit stealth bomber** from the **US Air Force** rounded out the attack by firing an **LRASM** (Long Range Anti-Ship Missile), according to a separate US Air Force statement dated the previous Monday. In total, four **Harpoon** missiles were fired during this phase, according to the **New Zealand Defence Force**, marking the very first participation of a **New Zealand Poseidon** in exercise **Valiant Shield**. *An American stealth bomber, a Japanese submarine, and New Zealand and Australian patrol aircraft striking the same target on the same day: it's hard to find a more telling image of what a functioning military alliance actually looks like.* ## The Symbolic Weight of the Name Juneau ### An echo of Guadalcanal, 84 years later The choice of the name **USS Juneau** for this SINKEX carries particular historical weight. According to **Navy Times**, the sinking comes nearly **84 years** after the first **USS Juneau** (CL-52) was sunk by a **Japanese torpedo** during the **Guadalcanal** campaign, in **November 1942**. That historic sinking remains infamous in the United States: after the explosion caused by a torpedo from Japanese submarine **I-26**, only **ten crew members** survived, and the **five Sullivan brothers** perished in the tragedy, an event that permanently changed US military policy on siblings serving together in combat. ### From enemies to steadfast allies The fact that a **Japanese submarine** symbolically delivered the final blow to the second **USS Juneau** during a joint, peaceful, cooperative exercise, rather than in a wartime context, illustrates the radical transformation of relations between the **United States** and **Japan** since **World War II**. This historical continuity, from confrontation to alliance, is not mentioned in any official statement as a deliberate message, but it escapes no informed observer of **Pacific** naval history. *There is something deeply fitting about former mortal enemies becoming pillars of the same collective security architecture. It's living proof that democratic alliances outlast the cycles of conflict that once divided them.* ## The Partners Engaged in the Exercise ### Five nations, one shared strategic vision According to **Navy Times**, **Valiant Shield** brings together the **United States**, **Japan**, **Australia**, **Canada**, and **New Zealand** in a biennial exercise designed to sharpen real-world skills in detecting, locating, tracking, and engaging adversary forces at sea, in the air, in space, on land, and in cyberspace. This diversity of participants illustrates the scope of the network of **democratic alliances** the **United States** continues to build in the **Indo-Pacific**, in direct response to China's military expansion in the region. ### Considerable resources deployed According to **DVIDS**, the official distribution platform of the **US Department of Defense**, the forces involved included the aircraft carrier **USS George Washington**, the ships **USS Shoup** and **USS Robert Smalls**, as well as **B-2 Spirit** bombers, **P-8A Poseidon** patrol aircraft, **MH-60R Seahawk** helicopters, and multiple **unmanned systems**. This accumulation of assets, drawn from several branches of the US armed forces and their allies, demonstrates the considerable logistical scale required to organize an exercise of this magnitude every two years. *It's no accident that an exercise like this requires an aircraft carrier, stealth bombers, and submarines from multiple countries: that is exactly the level of coordination credible deterrence against China demands.* ## The Geopolitical Context of the Pacific ### A region under growing tension Exercise **Valiant Shield 2026** takes place against a backdrop of **China** continuing to intensify its military presence in the **Indo-Pacific**, particularly around **Taiwan** and in the **South China Sea**. The growing number of allied exercises in the region is never an isolated gesture, but an ongoing response to this mounting pressure. For the **Pacific democracies**, the ability to demonstrate smooth military coordination among multiple nations remains one of the most effective deterrence tools against an adversary that continually tests the limits of Western resolve. ### A message sent without ambiguity Although no official statement reviewed explicitly names **China** as the target of the message sent by this exercise, the geographic location — near **Guam**, a major strategic US base in the **Western Pacific** — leaves little doubt as to the intended audience. Exercises of this kind fit into a long American tradition of preventive shows of force, meant to discourage any attempt at escalation before it materializes. *You can call it strategic caution or provocation, depending on which side you're on. But in a world where Beijing keeps multiplying aggressive gestures, visible deterrence remains preferable to silent naivety.* ## What Comes Next: RIMPAC 2026 ### An exercise calendar that isn't slowing down According to available information, another **SINKEX**-type exercise is also planned as part of **RIMPAC 2026** (Rim of the Pacific), which is set to run through the end of **July**. This continuity in the calendar of allied exercises illustrates the sustained intensity of US military engagement in the region. Far from an isolated event, **Valiant Shield** is thus part of a chain of coordinated exercises running throughout the year, reinforcing the ongoing presence of allied forces in the **Indo-Pacific**. ### Preparing for real-world scenarios These repeated exercises are not merely symbolic demonstrations: they allow allied forces to maintain a high level of operational readiness, essential should a real crisis break out in the region, whether around **Taiwan** or elsewhere in the **Pacific**. The biennial repetition of **Valiant Shield**, coupled with exercises like **RIMPAC**, creates a training rhythm that keeps allied forces vigilant without ever letting strategic pressure ease. *The steadiness of this military calendar may be the most important message of all: this isn't a one-off show, it's a sustained posture, year after year.* ## The Environmental Precautions of the SINKEX ### A rigorous protocol before every sinking According to **Navy Times**, every ship destined for a **SINKEX** undergoes a rigorous cleaning process before it is sunk, including removing all liquid **polychlorinated biphenyls** (PCBs) from transformers and large capacitors, as well as eliminating floatable materials, mercury, and fluorocarbon-containing materials. **Fuel** is also removed from tanks, piping, and auxiliary reservoirs before the ship is cleared to be sunk, a procedure directly overseen by a **US Navy** environmental officer. ### Systematic independent oversight An **environmental, safety, and health manager** as well as a **quality assurance supervisor** are present to inspect the environmental remediation carried out before every exercise of this kind, according to the same source. This procedural rigor is meant to minimize the ecological impact of these exercises on the **Pacific**'s marine ecosystem. This environmental dimension, rarely highlighted in media coverage of these spectacular exercises, deserves recognition as an example of operational responsibility that accompanies a show of military power. *It's rarely imagined that such a spectacular war exercise comes with such a strict environmental protocol. It's a detail worth knowing, even if it will never make headlines the way a sinking ship does.* ## Guam's Strategic Role ### A base at the heart of the American setup Guam's proximity to the exercise area is not an incidental geographic detail. This US territory in the **Western Pacific** is one of the **United States**'s most important strategic bases in the region, serving as a logistical and military anchor point for numerous operations across the **Indo-Pacific**. The area where the **SINKEX** took place, more than **200 nautical miles** off **Guam**, within the **Mariana Islands** training complex, illustrates the systematic use of this infrastructure for large-scale exercises. ### A long-term strategic investment The continuous buildup of military capabilities around **Guam** fits into a long-term American strategy aimed at maintaining a robust presence in the face of **China**'s regional ambitions. This infrastructure enables rapid deployments without relying exclusively on bases located on the American mainland. No source reviewed details the precise costs associated with this repeated use of **Guam** as an exercise platform, but the scale of resources deployed suggests a considerable and recurring logistical investment. *Guam remains one of the blind spots in the Western public debate over Pacific defense, even though it's precisely this kind of infrastructure that makes a rapid response possible in a real crisis.* ## Tactical Lessons Drawn From the Exercise ### Joint-force integration put to the test The **USS Juneau** SINKEX made it possible to concretely test allied forces' ability to coordinate strikes from completely different domains — submarine, air, and naval — against a common target. This joint and inter-allied integration remains one of the most complex challenges to master in peacetime. According to the naval statement cited by **USNI News**, this coordination between the **United States** and its allies is precisely aimed at sharpening the skills needed for a realistic weapons engagement, under conditions no simulator can faithfully reproduce. ### Lessons for future exercises The data gathered during this SINKEX will almost certainly be used to fine-tune the protocols of future exercises, particularly regarding the synchronization of fire between multiple platform types belonging to different nations. This kind of cumulative learning is one of the implicit goals of every edition of **Valiant Shield**. The presence, for the first time, of a **New Zealand Poseidon** in this phase of the exercise also illustrates the gradual expansion of tested capabilities from one edition to the next, a sign that the alliance keeps deepening rather than stagnating. *Every edition of this exercise adds a new capability, a new partner, or a new platform. That is exactly how a military alliance stays alive rather than becoming a repeated formality with no evolution.* ## What This Means for the Future of Western Deterrence ### A model that could be replicated elsewhere **Valiant Shield 2026** offers a model other theaters could draw on, particularly in **Europe** facing **Russia**, where multinational coordination remains just as essential to deter any attempt at escalation. The underlying logic — demonstrating collective capability rather than simply adding up individual forces — extends well beyond the **Pacific**. This approach, grounded in the regular repetition of concrete exercises rather than mere diplomatic statements, remains one of the most effective tools Western democracies have to maintain a strategic edge against authoritarian adversaries. ### A direct response to the authoritarian axis Faced with the growing convergence between **China**, **Russia**, **Iran**, and **North Korea**, this visible demonstration of allied cohesion in the **Pacific** sends a message that extends beyond that region alone: Western democracies and their partners remain capable of coordinating a credible military response, wherever the threat emerges. This may well be **Valiant Shield 2026**'s most lasting contribution: not just the spectacular sinking of a decommissioned ship, but renewed proof that the Western security architecture in the **Pacific** remains solid, active, and constantly evolving. *I remain convinced that this kind of demonstration counts for more than a thousand diplomatic statements. Against regimes that understand only the balance of power, visible readiness remains the most effective language.* ## The Official Voices Behind the Exercise ### Testimony from the pilots involved **Squadron Leader Michael Craies**, pilot of the **New Zealand Poseidon** that took part in the final strike, noted in a statement reported by **USNI News** that **"the professionalism of the three P-8A crews involved"** allowed the target to be acquired quickly and four **Harpoon** missiles fired in total. This direct testimony, rare in the usually more formal language of military communication, offers a concrete glimpse into the level of technical coordination required to synchronize fire between multiple crews of different nationalities in a single operation. ### The American command's perspective **Rear Admiral Eric Anduze** stressed that this exercise represented an opportunity to **"integrate capabilities across domains,"** language that reflects current US military doctrine centered on **multi-domain** operations rather than forces siloed by branch or nation. This emphasis on integration, echoed by several officers across different statements, shows that inter-allied coordination is no longer seen as a secondary objective but as a defining priority of contemporary Western military doctrine. *These official statements may sound scripted, but they reveal a coherent doctrine: tomorrow's Western power will rest less on the size of national arsenals than on their ability to operate as a single system.* ## The Limits and Gray Areas of This Coverage ### What the official statements don't say No source reviewed details the precise **total cost** of exercise **Valiant Shield 2026**, nor the exact personnel numbers committed by each participating nation. The official statements, while detailed on the capabilities tested, remain more discreet about the precise budgetary and logistical aspects. Likewise, no official statement explicitly names **China** as a direct motivation for this exercise, which calls for caution in interpreting the underlying geopolitical message, even if the regional context makes that reading largely plausible. ### Necessary caution on the strategic interpretation It would be an overstatement to claim that this exercise, on its own, fundamentally shifts the strategic balance of the **Pacific**. It is one link among many in an ongoing chain of exercises, deployments, and defense agreements that together make up the Western posture in the region. The real significance of **Valiant Shield 2026** will be measured more over time, through the repetition and deepening of these partnerships, than in the immediate impact of a single edition of the exercise. *I'd rather stay cautious than turn a biennial exercise into a major geopolitical turning point. Its real value will show up in consistency, not in the flash of a single filmed sinking.* ## The Expected Diplomatic Fallout ### Strengthened bilateral ties Beyond the strictly military dimension, an exercise of this scale typically produces lasting diplomatic benefits among participating nations. Technical exchanges between American, Japanese, Australian, Canadian, and New Zealand officers create professional networks that endure well beyond the exercise's duration. These interpersonal ties between commanders and crews, woven over successive editions of **Valiant Shield**, reinforce the mutual trust needed to respond quickly should a real crisis erupt in the region. ### A showcase for quieter partners For countries like **Canada**, whose military footprint in the **Pacific** remains more modest than that of the United States or **Japan**, participating in **Valiant Shield** is a valuable opportunity to demonstrate concrete commitment to regional security, beyond mere diplomatic statements. This heightened visibility also allows these partners to justify, on the domestic front, the investments made in their own naval and air capabilities intended to operate in theaters far from their own territory. *The quiet diplomatic value of these exercises is often underestimated. They aren't just shows of force: they're opportunities to build human relationships between service members who may one day have to coordinate in a far more serious context.* ## Conclusion: Allied Power Is Built Exercise After Exercise ### A symbol that goes beyond the sinking itself The sinking of the **USS Juneau** will remain, beyond its spectacular nature, a symbol of Western military cooperation that keeps deepening in the **Indo-Pacific**. Five democratic nations, united by a shared vision of regional security, demonstrated their ability to act together with precision and coordination. ### A biennial appointment that shows no sign of slowing **Valiant Shield** will return in two years, likely with new partners, new capabilities, and new challenges to integrate. In a world where **China**, **Russia**, **Iran**, and **North Korea** continue testing the limits of the international order, this continuity of training remains one of the best guarantees of Western stability in the **Pacific**. **By Maxime Marquette, columnist** ## Columnist's transparency note ### Editorial stance I am not a journalist but a **columnist and analyst**. My expertise lies in observing and analysing the geopolitical, economic and strategic dynamics that shape our world. My work is to take political strategies apart, to understand global economic movements, to put the decisions of international actors in context and to offer analytical perspectives on the changes that are redefining our societies. I do not claim the cold objectivity of traditional journalism, which stops at reporting facts. **I claim analytical clarity**, rigorous interpretation and a deep understanding of the complex issues that concern us all. My role is to give meaning to the facts, to place them in their historical and strategic context, and to offer a critical reading of events. ### Method and sources This text keeps the basic distinction between **verified facts and interpretive analysis**. The rule never changes: a factual claim is published only when a verifiable source supports it, and the sources this article actually used are listed under **Sources**, never here. **Primary source families** used by the publication, when the story has them: official statements from governments and international institutions, public statements by political leaders, reports from intergovernmental organisations, dispatches from recognised international news agencies. **Secondary source families**: specialised publications, internationally recognised news media, analyses from established research institutions, reports from industry organisations. When an article cites statistical, economic or geopolitical data, it comes from the institutions that produce it (intergovernmental organisations, central banks, national statistics offices), and the exact institution is named under **Sources**. ### Nature of the analysis The analyses, interpretations and perspectives in the analytical sections of this article are a **critical, contextual synthesis** based on the information available, the trends observed and the expert comments cited in the sources consulted. My role is to interpret these facts, to set them in the context of today's geopolitical and economic dynamics, and to give them a coherent meaning within the larger story of the changes shaping our time. These analyses reflect expertise built through continuous observation of international affairs and an understanding of the strategic mechanisms that drive global actors. This article describes a documented state of affairs on its publication date, not a prediction: later developments may shift its outlook. No update is promised in advance; when an article is corrected or completed, the change is dated in the text. ## Sources ### Primary sources - [USNI News — U.S., Partners Wrap Exercise Valiant Shield, July 1, 2026](https://news.usni.org/2026/07/01/u-s-partners-wrap-exercise-valiant-shield) - [Navy Times — Japanese torpedo sends US ship to the ocean floor during Valiant Shield exercise, June 30, 2026](https://www.navytimes.com/news/your-navy/2026/06/30/japanese-torpedo-sends-us-ship-to-the-ocean-floor-during-valiant-shield-exercise/) - [DVIDS — Decommissioned USS Juneau (LPD 10) sunk during SINKEX in support of Valiant Shield 2026, July 3, 2026](https://www.dvidshub.net/video/1013423/decommissioned-uss-juneau-lpd-10-sunk-during-sinkex-support-valiant-shield-2026) ### Secondary sources - [U.S. Navy — Allies Come Together in the Indo-Pacific for Exercise Valiant Shield 26](https://www.navy.mil/Press-Office/News-Stories/display-news/Article/4523047/allies-come-together-in-the-indo-pacific-valiant-shield-26/) - [US Department of Defense — Allies Come Together in the Indo-Pacific for Exercise Valiant Shield 26](https://www.war.gov/News/News-Stories/Article/Article/4522795/allies-come-together-in-the-indo-pacific-for-exercise-valiant-shield-26/) - [U.S. Pacific Fleet — Allies Come Together in the Indo-Pacific, Valiant Shield 26](https://www.cpf.navy.mil/Newsroom/News/Article/4523327/allies-come-together-in-the-indo-pacific-valiant-shield-26/) --- Source: Maxime Marquette, MadMax. When citing, name the author and link https://mad-max.co/en/article/lexercice-valiant-shield-2026-sacheve-par-un-naufrage-symbolique-dans-le-pacifique