In a striking display of military cooperation and resolve, Australia, Canada, and the Philippines joined forces on August 27, 2025, conducting joint naval air defense drills just east of Scarborough Shoal—a disputed and highly sensitive maritime area in the South China Sea. The exercise, which comes amid rising tensions between Manila and Beijing, marked the latest chapter in a region where sovereignty claims and military maneuvers frequently collide.
The trilateral drills, part of the sweeping Exercise Alon 2025, saw three warships—Philippine Navy flagship BRP Jose Rizal (FF-150), Royal Australian Navy destroyer HMAS Brisbane (DDG-41), and Canadian frigate HMCS Ville de Québec (FFH-332)—operating in close formation. The ships were joined by at least three Royal Australian Air Force fighter jets and embarked helicopters, with all forces working together to counter simulated aerial threats through coordinated defensive maneuvers, according to statements from the Philippine military reported by the Associated Press.
Exercise Alon 2025 isn’t just another drill on the calendar. It stands as the largest military exercise ever staged between the Philippines and Australia, involving more than 3,600 personnel over a 15-day period. The drills, which included amphibious, aerial, and naval components across the Philippine archipelago, are scheduled to conclude on August 29, 2025. The scale and sophistication of Alon 2025 underscore a growing commitment among like-minded nations to bolster defense ties and readiness in a region fraught with uncertainty.
“This engagement reaffirms the Armed Forces of the Philippines’ commitment to advancing defense cooperation with like-minded nations,” the Philippine military declared in a statement, as quoted by the Associated Press. The sentiment was echoed by Australian Lieutenant Colonel Andrew Raven, who told the Philippine Daily Inquirer, “This shows we can deploy a combat-ready and combat-capable force within the Indo-Pacific to assist a security partner such as the Philippines.” Raven highlighted that the exercise involved “the largest airlift of Australian combat forces since the 1999 East Timor mission.”
The drills were conducted in waters claimed by both China and the Philippines, with Vietnam, Malaysia, Brunei, and Taiwan also asserting overlapping claims in the South China Sea—a vital global trade artery. Scarborough Shoal, in particular, has been a flashpoint for confrontations. Chinese forces have long guarded the uninhabited atoll, and risky maneuvers to drive away Philippine aircraft and ships have become increasingly common. The situation escalated further following a remarkable incident on August 11, 2025, when a Chinese navy ship collided with a Chinese coast guard vessel near the shoal as both tried to block a Philippine coast guard ship. The collision, captured on video by the Philippines, left the coast guard ship’s bow severely damaged and, according to Philippine military officials, may have resulted in casualties. Satellite images provided to Reuters by Maxar Technologies later showed the damaged vessel under repair at Hainan Island’s Yulin naval base.
China’s response to these events has been characteristically firm, though officials have avoided direct comment on the collision itself. Beijing has repeatedly warned it would defend the shoal and surrounding waters, which it claims under its expansive “10-dash line.” Despite a landmark 2016 ruling by the Permanent Court of Arbitration in The Hague rejecting China’s sweeping claims to the South China Sea, Beijing continues to press its case with an assertive naval, coast guard, and militia presence. The court’s ruling also found that China’s blockade of Scarborough Shoal violated international law and recognized the area as a traditional fishing ground for several countries. Nevertheless, sovereignty over the shoal remains unresolved.
The recent joint exercises took place against this backdrop of heightened tension. Notably, the Philippine military reported that the drills concluded safely, without any direct encounter with Chinese coast guard, navy, or suspected militia ships, which have been closely monitoring the area. As USNI News pointed out, these air defense drills were part of a broader shift in Manila’s military posture—from internal security operations to external and territorial defense. Philippine leadership has stressed the importance of modernizing the country’s armed forces through both bilateral and multilateral exercises, and the presence of Canadian and American forces as observers or participants in recent years reflects a growing network of security partnerships.
China, for its part, has not issued an immediate public response to the latest drills. However, the Chinese government routinely criticizes foreign military operations near its claimed territories, framing them as provocations. Earlier in August, after a U.S. Navy freedom of navigation operation near Scarborough Shoal, China claimed to have chased off the American warship. The U.S., which has no territorial claims in the South China Sea, has repeatedly challenged China’s assertions by sending naval vessels through the contested waters. The Philippines, as the oldest treaty ally of the U.S. in Asia, has received repeated assurances from Washington that America is obligated to defend the Philippines if Filipino forces come under armed attack, including in the South China Sea.
The presence of U.S. warships in the area is hardly an isolated event. On August 13, 2025, just two days after the Chinese collision, the U.S. Navy deployed a guided missile destroyer and a littoral combat ship about 30 nautical miles from Scarborough Shoal in a freedom of navigation operation. These ships were shadowed by a Chinese navy vessel, but no incidents were reported, according to the Philippine coast guard.
Meanwhile, the People’s Liberation Army has stepped up aerial interdiction of Philippine government and military aircraft in the South China Sea. Manila’s Cessna aircraft and Coast Guard planes—sometimes carrying journalists—have been intercepted by Chinese fighter jets and helicopters operating from Beijing’s artificial island bases. In response, the Philippine military has considered deploying its own fighter escorts during such missions and has integrated aerial elements into joint patrols with partners like the United States.
As Exercise Alon 2025 draws to a close, the message from Manila, Canberra, and Ottawa is unmistakable: regional security partnerships are deepening, and the willingness to cooperate in the face of shared threats is only growing stronger. The trilateral drills near Scarborough Shoal may not resolve the underlying disputes, but they send a powerful signal of unity and preparedness in one of the world’s most contested maritime regions.
For now, all eyes remain fixed on the South China Sea, where the next move—whether diplomatic or military—could reverberate far beyond the waves that lap Scarborough’s contested shores.