https://www.gatestoneinstitute.org/14068/china-aggression-south-china-sea
As protesters gathered outside the Chinese Embassy on April 10 in Manila, to express their outrage at China’s naval aggression, U.S. and Filipino troops conducted a joint military exercise in the South China Sea, aimed at preparing the Philippines to “deal with any potential island invasion.”Any such shift on the part of Manila towards Moscow should cause Washington to step up its engagement with the Philippines, to prevent Chinese and Russian attempts at controlling the South China Sea’s rich resources and China possibly seizing it as a maritime chokepoint.
A long-standing territorial dispute between Beijing and Manila over Thitu Island (also known as Pagasa), one of the Spratly Islands in the South China Sea, resurfaced in full force recently, when more than 200 Chinese boats were spotted in the vicinity of the island. Thitu Island is controlled and administered by the Philippines, and Filipino civilians and military personnel inhabit the island. Sovereignty over the island is claimed by the Philippines, China, Taiwan and Vietnam.
Increased Chinese encroachment on the Spratly Islands — and a recent “goodwill visit” of Russian Navy ships to the Philippines — should be cause for alarm in Washington.
In recent years, Beijing-Manila relations improved to the point where Philippines President Rodrigo Duterte and Chinese President Xi Jinping signed 29 cooperation agreements, including a memorandum of understanding on joint oil and gas development in the South China Sea.