evidence: China’s sweeping claims of sovereignty over the sea—and the sea’s estimated 11 billion barrels of untapped oil and 190 trillion cubic feet of natural gas—have antagonized competing claimants Brunei, Indonesia, Malaysia, the Philippines, Taiwan, and Vietnam. As early as the 1970s, countries began to claim islands and various zones in the South China Sea, such as the Spratly Islands, which possess rich natural resources and fishing areas. The failure of Chinese and Southeast Asian leaders to resolve the disputes diplomatically could undermine international laws governing maritime disputes and encourage destabilizing arms buildups. [...] Upon assuming office in June 2022, Philippine President Ferdinand Marcos Jr. rejected the conciliatory stance toward China adopted by his predecessor, Rodrigo Duterte. The Philippines’ most contentious disputes with China center on the Second Thomas Shoal of the Spratly Islands, which lies within the Philippines’ 200-mile EEZ. In 1999, the Philippines intentionally grounded a ship to reinforce its territorial claims to the area which it calls the West Philippine Sea. Since then, the Philippine Coast Guard has conducted monthly resupply missions to its military contingent on the ship, known as the BRP Sierra Madre. Chinese Coast Guard vessels began to employ dangerous tactics to harass Philippine resupply missions in 2023, leading to heightened clashes. Collisions have become increasingly common, and the Chinese Coast Guard has used a military-grade laser and repeatedly fired water cannons against Philippine ships. On June 17, a Chinese vessel and a Philippine supply ship collided near the Second Thomas Shoal; both sides blamed the other for the incident.