The confrontation between China and the Philippines over the South China Sea has erupted again, this time spilling dramatically onto the stage of an international defence conference in Seoul. Philippine Defence Secretary Gilberto Teodoro was speaking about maritime security and the 2016 international arbitration ruling against China's sweeping claims when he was handed a note that he said came from Chinese representatives. It reiterated Beijing's longstanding position that China neither accepts nor recognises the ruling. Teodoro read it aloud and fired back: China rejected the decision “because you lost”, before telling Beijing to “have a little bit of decency” and “a little bit of shame”.
China responded the following day, accusing Philippine officials of seeking attention and “stirring up trouble”. The exchange might have been dismissed as diplomatic theatre were it not taking place against a far more dangerous backdrop at sea. Chinese and Philippine vessels have repeatedly confronted each other around disputed reefs and shoals, with collisions, water cannons, blocking manoeuvres and increasingly hostile encounters becoming part of the contest. In July, the Philippine military accused Chinese coast guard personnel of repeatedly striking a Filipino sailor on the head with a wooden baton during an encounter at a disputed shoal. Beijing disputed Manila's account and said Philippine boats had rammed a Chinese vessel. Teodoro now describes China's behaviour as no longer merely “grey-zone” pressure but outright “coercion, bullying and aggression”.
At the centre of the argument remains the 2016 ruling by an international tribunal in The Hague, which found no legal basis for China's expansive maritime claims under the United Nations Convention on the Law of the Sea. Beijing rejected the proceedings and the ruling, and continues to claim sovereignty over most of the South China Sea. Manila insists the decision is legally binding. That disagreement matters because these waters are not simply dots on a map: they contain fishing grounds, possible energy resources and some of the world's busiest shipping routes. The Philippines is also a US treaty ally, meaning a sufficiently serious attack on Philippine armed forces, aircraft or public vessels could potentially draw Washington into the crisis.
India increasingly has a stake in what happens next. New Delhi and Manila elevated their relationship to a Strategic Partnership in 2025, with defence and maritime security at its centre. The most visible symbol is the $374.9 million BrahMos deal, under which the Philippines became the first foreign customer for India's supersonic shore-based anti-ship missile system. The weapon gives Manila a powerful land-based capability to threaten hostile ships approaching parts of its coastline. But the relationship has moved well beyond a weapons sale. India and the Philippines have expanded intelligence exchanges, coast guard cooperation, military training and service-to-service engagement, while discussing defence co-production and greater interoperability.
The symbolism became unmistakable in August 2025 when Indian warships joined Philippine vessels for their first-ever maritime cooperative activity in the South China Sea and West Philippine Sea. For India, supporting Manila serves several interests at once. The Philippines sits at a critical point in the Indo-Pacific maritime system through which Indian commerce and energy supplies ultimately connect with East Asia. More importantly, New Delhi has its own complicated relationship with Beijing, including an unresolved Himalayan boundary dispute and a profound strategic trust deficit. A region in which China can unilaterally impose territorial claims on smaller neighbours would therefore have consequences far beyond the Philippines.
That does not mean India is about to become a party to Manila's territorial disputes. The India-Philippines partnership contains no mutual-defence guarantee comparable to Manila's treaty with Washington. But New Delhi has increasingly emphasised freedom of navigation, international law and peaceful resolution of maritime disputes while helping the Philippines build the military capacity to defend its interests.
The latest exchange between Beijing and Manila therefore matters in New Delhi. Every confrontation in the South China Sea tests whether legal rulings, smaller states and freedom of navigation can withstand the pressure of a much larger power. India has already supplied the Philippines with missiles designed to make coercion more costly. As the relationship between Manila and Beijing deteriorates, India's partnership with the Philippines is becoming less peripheral to its China strategy and increasingly part of the wider balance of power in the Indo-Pacific.
