Philippines Warns Towing a Grounded Warship Would Be an 'Act of War' — as a Chinese Carrier Sails Through Its Southern Waters

The Philippines' defense minister has drawn a line at Second Thomas Shoal: if China follows through on what Philippine media report as a plan to remove or tow away the grounded transport ship Sierra Madre, that would amount to an "act of war" — and if Chinese personnel boarded the vessel, it could trigger the 1951 US-Philippines Mutual Defense Treaty. But Gilberto Teodoro also moved quickly to soften his own warning, saying an "act of war" would not automatically mean the two countries were at war and that any decision on invoking the treaty would rest with President Ferdinand Marcos Jr. (@环球时报)

The warning rests, for now, on a Philippine media report that China is considering action against the Sierra Madre — a decommissioned landing ship Manila ran aground on the shoal in 1999 and has kept manned ever since, to hold its claim in the Spratlys. China has not confirmed any such plan, and the story has not been independently verified. The Global Times, the state-affiliated paper that follows South China Sea disputes closely, framed Teodoro's statement in terms its readers would recognize: he was "charging at China with a paper shield," it wrote — the phrase itself became the hotword, trending as 纸糊的盾牌, a shield pasted from paper. (@环球时报)

The rhetoric landed in a week of visible movement. China's sole operational aircraft carrier, the Liaoning, led a carrier group through the Balabac Strait — between the Philippine island of Palawan and Malaysia — from the Sulu Sea into the Sulawesi Sea, waters that Chinese commentators describe as the Philippines' strategic rear. State broadcaster CCTV marked the transit with a feature titled "Ten Years On, the Liaoning Has Completed Its Three Steps," framing the passage as the maturity of a fleet that a decade ago had no operational carrier aviation at all. (CCTV) A Beijing Time video program went further back, invoking Zheng He's 15th-century treasure fleets in an explanation of why the strait matters. (@北京时间)

Second Thomas Shoal is the South China Sea's most persistent flashpoint because it is the place where the two countries' claims are physically stacked: a rusting hulk, a permanent Filipino detachment resupplied by boat over Chinese objection, and since 2023 repeated confrontations around the resupply runs. Teodoro's formulation raises the stakes on both sides — by defining a Chinese tow as a treaty-triggering event, and by clarifying, in the same breath, that no treaty trigger is automatic. What happens next depends on a report neither government has confirmed, and on whether the Sierra Madre, 27 years in the water, decides the timeline itself.