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Back to headlinesAugust 26, 2026, 1:00 PM PHT

Defense · West Philippine Sea

AFP, US and Australia Complete 19th Maritime Cooperative Activity in West Philippine Sea

The weeklong activity included maritime-domain awareness, anti-submarine warfare, replenishment at sea and joint maneuver exercises.

FMB News editorial visual for the 19th MMCA in the West Philippine SeaFMB News editorial visual
FMB News editorial visual accompanying coverage of the 19th Multilateral Maritime Cooperative Activity.FMB News editorial visualLicense details

Why this matters to Filipinos

FMB News connects the verified facts and evidence in this report to the decisions, costs, opportunities, and risks that may affect Filipinos, Philippine communities, and the country.

Editorial standard: Sources are listed below. Verified reporting, attributed claims, uncertainty, and analysis remain distinct.

Verified facts

What happened

Naval and air units from the Philippines, United States and Australia completed the 19th Multilateral Maritime Cooperative Activity in the West Philippine Sea, the Armed Forces of the Philippines announced Wednesday.

The activity ran from August 19 to 25 and brought together units from the AFP, United States Pacific Command and Australian Defence Force.

What the exercise covered

According to the AFP, participating forces conducted communications exercises, maritime-domain awareness activities, anti-submarine warfare, replenishment at sea, division tactics and officer-of-the-watch maneuvers, a photo exercise and fly-by operations.

Philippine assets included BRP Diego Silang, an AW-109 naval helicopter, FA-50 aircraft, a C-208B surveillance aircraft and a W-3A Sokol search-and-rescue helicopter, alongside the Philippine Coast Guard's BRP Teresa Magbanua. The United States deployed USS Santa Barbara and a P-8A Poseidon, while Australia deployed HMAS Supply, an MH-60R helicopter and another P-8A.

Context

Context

The AFP said the activity was intended to improve maritime interoperability and operational coordination among participating forces and support a free, open and secure Indo-Pacific.

The exercise took place amid continued Philippine defense cooperation with treaty allies and regional partners in the West Philippine Sea.

Filipino relevance

Why this matters

Regular multilateral activities test whether participating forces can communicate, maneuver and sustain operations together at sea and in the air. They also carry diplomatic significance because they take place amid continuing disputes and competing maritime claims in the South China Sea.

What to watch next

What to watch next

The AFP has said multilateral maritime activities with partner nations will continue. Future iterations will show how the participating forces expand the complexity and frequency of joint operations.

Sources and public record

Philippine News Agency: 19th MMCA in WPS with US, Australia successful - AFP (August 26, 2026, 1:07 PM PHT)