The World’s Largest Naval Exercise Shows the Strength of the U.S.-Led Alliance
When 30 nations send their warships, submarines, aircraft and military personnel to operate as a single force, the message extends far beyond training. It is a demonstration of unity, capability and deterrence.
That was the unmistakable signal delivered by Rim of the Pacific 2026, better known as RIMPAC, the world’s largest multinational maritime exercise. Held in and around Hawaii every two years, this year’s drills brought together approximately 30,000 personnel, more than 30 surface ships, five submarines and more than 190 aircraft for five weeks of complex operations. More than 500 maritime events, over 2,400 flight sorties and thousands of operational scenarios tested how allied forces would fight, communicate and sustain one another during a major conflict.
At a time when China has become increasingly aggressive in the South China Sea, Russia continues to challenge Western security interests, and North Korea continues expanding its nuclear arsenal, RIMPAC demonstrated that the United States remains capable of assembling a powerful coalition when it matters most.
What Is RIMPAC?
Founded in 1971 by the United States, Australia and Canada, RIMPAC has grown from a small gathering of five participating nations into the premier multinational naval exercise in the world.
Its purpose is straightforward. Allied militaries train together before a crisis occurs. Sailors, pilots, Marines and commanders learn how to communicate, share intelligence, coordinate logistics and fight as a single force despite speaking different languages and operating different equipment.
The exercise also provides an opportunity to test emerging technologies, conduct live-fire missile exercises, practice amphibious assaults, perform anti-submarine warfare, rehearse humanitarian disaster response and improve command and control across multinational forces.
As U.S. Vice Adm. Jeff Jablon explained, “Thirty like-minded nations build the trust, cooperation and interoperability to ensure a free and open Indo-Pacific.”
He emphasized that RIMPAC is ultimately about readiness.
“We’re able to operate together, communicate together and strengthen our ability to respond to crises, deter aggression and preserve sovereignty across the Indo-Pacific.”
Thirty Nations Answer the Call
The breadth of participation illustrates how extensive the U.S. security network has become.
Participating nations included the United States, Australia, Canada, Japan, South Korea, New Zealand, the Philippines, Singapore, Mexico, Chile, Peru, Italy, Spain, the United Kingdom, France, Germany, Colombia and numerous additional allies and partners from across Europe, Asia and the Pacific.
Warships from many of these nations operated side by side in Pearl Harbor before deploying together at sea.
Among those participating were:
- The USS Theodore Roosevelt aircraft carrier and multiple U.S. destroyers, cruisers and amphibious ships.
- Japanese Aegis destroyers.
- South Korean destroyers, amphibious ships and submarines.
- Canadian frigates and submarines.
- Australian surface combatants.
- New Zealand support ships.
- Philippine naval vessels and, for the first time ever, the Philippine Coast Guard.
- Ships from Chile, Peru, Spain, Italy, Mexico and Singapore.
Rather than operating as independent national forces, these vessels trained as a coordinated multinational fleet capable of responding to regional crises.
New Leadership Shows a Stronger Alliance
One of the most significant developments at RIMPAC 2026 was not simply the number of participating countries but who was leading major portions of the exercise.
Only three of the most senior leadership positions were held by Americans.
Japan’s Rear Adm. Takuo Kobayashi served as vice commander of the combined task force.
South Korea’s Rear Adm. Kim In-ho became the first Asian officer to command the exercise’s maritime component.
Canada commanded the air component.
These leadership assignments reflect an alliance that is becoming increasingly integrated rather than dependent solely upon American commanders.
Kobayashi summarized the philosophy simply:
“If you have 30, 50 or 100 friends, it’ll be better than just one or two formal alliances.”
That sentiment captures why RIMPAC matters. Military partnerships are built long before conflict begins.
Readiness Through Realistic Training
The sheer scale of RIMPAC allows participating militaries to practice operations that would be impossible to conduct alone.
Forces carried out amphibious assaults, anti-submarine warfare, coordinated missile exercises, maritime replenishment, cyber operations, humanitarian assistance and disaster response.
Navies tested new weapons, autonomous systems, logistics networks and communications.
Foreign warships operated alongside American carrier strike groups while aircraft from multiple nations flew integrated missions.
Humanitarian exercises involving military forces, civilian agencies and international organizations rehearsed disaster relief, casualty evacuation, logistics coordination and emergency medical operations.
Even seemingly routine logistics received attention. Military officials noted that allied nations still face challenges ranging from incompatible communications systems to differences in medical supply standards. Identifying and solving those problems during peacetime greatly improves readiness during an actual conflict.
As Chilean Commodore Andres Howard observed, testing equipment alongside allies produces far greater value than testing alone.
“It’s not the same when you are testing it alone.”
A Powerful Deterrent
No senior official explicitly identified China as the target of the exercises.
Nevertheless, the strategic message was difficult to miss.
The Indo-Pacific has become increasingly contested as China expands its naval capabilities, militarizes disputed islands and pressures neighboring countries including the Philippines.
Russia also continues expanding military cooperation with China while seeking greater influence throughout the Pacific.
Against that backdrop, RIMPAC demonstrates that the United States does not stand alone.
Instead, potential adversaries see aircraft carriers operating alongside allied destroyers, submarines, maritime patrol aircraft, amphibious forces and thousands of personnel from democracies spanning multiple continents.
Vice Adm. Jablon acknowledged the obvious deterrent effect.
“But I’m sure there’s some deterrent effect when they see 30 like-minded nations working together.”
That observation may be understated. The ability to rapidly assemble and operate a multinational force complicates the strategic calculations of any adversary considering military aggression.
The Alliance Still Has Teeth
Questions have periodically surfaced about whether America’s alliances remain as strong as they once were.
Political disagreements among allies are inevitable. Nations often disagree over trade, defense spending or foreign policy priorities.
RIMPAC suggests those differences have not undermined military cooperation.
Instead, the exercise revealed an alliance becoming more capable, more interoperable and increasingly willing to share leadership responsibilities.
The United States still supplied the centerpiece of the exercise through the USS Theodore Roosevelt carrier strike group and its unmatched ability to project power. But America’s allies contributed modern warships, aircraft, submarines, command staffs and increasingly sophisticated military capabilities of their own.
For Beijing, Moscow and other governments watching closely, the message was unmistakable.
The U.S.-led alliance remains capable of bringing together dozens of nations, tens of thousands of military personnel and some of the world’s most advanced naval forces into a single integrated fighting force. That level of cooperation cannot be created overnight. It is built through decades of trust, training and shared commitment.
RIMPAC 2026 demonstrated that when challenged, America’s allies are still prepared to rally together. For potential adversaries contemplating confrontation in the Indo-Pacific, that is a reality worth taking seriously.
| Country | Vessel Name / Hull Number | Vessel Class & Type |
|---|---|---|
| United States | USS Theodore Roosevelt (CVN 71) | Theodore Roosevelt-class Nuclear Aircraft Carrier |
| United States | USS Charlotte (SSN 766) | Los Angeles-class Fast Attack Submarine |
| Australia | HMAS Sydney (DDG-42) | Hobart-class Guided-Missile Destroyer |
| Japan | JS Kongō (DDG-173) | Kongō-class Guided-Missile Destroyer |
| South Korea | ROKS Jeongjo the Great (DDG-995) | Sejong the Great-class (Batch II) Aegis Destroyer |
| South Korea | ROKS Daejeon (FFG-823) | Daegu-class Guided-Missile Frigate |
| South Korea | ROKS Cheon Ja Bong (LST-688) | Cheon Wang Bong-class Tank Landing Ship |
| Canada | HMCS Ottawa (FFH-341) & HMCS Regina (FFH-334) | Halifax-class Patrol Frigates |
| Canada | MV Asterix | Auxiliary Supply Logistics Vessel |
| Philippines | BRP Miguel Malvar (FFG-06) | Jose Rizal-class Guided-Missile Frigate |
| Philippines | BRP Gabriela Silang (OPV-8301) | Offshore Patrol Vessel |
| Peru | BAP Pisco (AMP-156) | Makassar-class Landing Platform Dock |
| New Zealand | HMNZS Aotearoa (A11) | Polar-Class Fleet Replenishment Oiler |