Geography of Taiwan its narrowest. Part of the continental shelf, the Strait is no more than deep, and has become a land bridge during glacial periods. To the south, the island of Taiwan is separated from the Philippine island of Luzon by the -wide Luzon Strait. The South China Sea lies to the southwest, the East China Sea to the north, and the Philippine Sea to the east. Smaller islands of the archipelago include the Penghu islands in the Taiwan Strait west of the main island, with an area of , the tiny islet of Xiaoliuqiu off the southwest coast, and Orchid Island
Presidency of Dwight D. Eisenhower States and seven other countries created the Southeast Asia Treaty Organization (SEATO), a defensive alliance dedicated to preventing the spread of Communism in Southeast Asia. In 1954, China began shelling tiny islands off the coast of Mainland China which were controlled by the Republic of China (ROC). The shelling nearly escalated to nuclear war as Eisenhower considered using nuclear weapons to prevent the invasion of Taiwan, the main island controlled by the ROC. The crisis ended when China ended the shelling and both sides agreed to diplomatic talks; a second crisis in 1958 would end in a similar fashion. During