evidence: In recent weeks, the People’s Republic of China (PRC) has dispatched ships and other maritime forces to the disputed Spratly islands near the Philippines. The goal has been to coerce the Philippines into withdrawing from the contested Second Thomas Shoal, effectively ceding it to the PRC. China’s actions are in defiance of the international Permanent Court of Arbitration’s findings that undermine PRC claims to the Spratlys. They therefore constitute a serious challenge to the international rules governing maritime conduct, as well as to broader peace and stability in the South China Sea, through which enormous amounts of global trade flow. [...] China is clearly intent upon coercing the Philippines out of its position in the Spratlys, regardless of the Philippines’ formal legal rights and claims. Indeed, it is quite likely that the PCA findings have only strengthened the PRC’s resolve to secure the Spratlys (as well as the separate Scarborough Shoal and Macclesfield Bank territories). At the same time, the PRC is likely trying to signal to the region that American support is both escalatory and counterproductive. [...] As important, it will signal to Beijing that American willingness to confront Chinese salami-slicing tactics against its neighbors remains hollow. It is worth recalling that in 2012, the United States chose to persuade the Philippines to withdraw from Scarborough Shoal (a separate set of features north of the Spratlys) while making no effort to compel the PRC to do the same. In effect, Washington forced Manila to cede that set of features to the PRC.