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
First Taiwan Strait Crisis of southeastern China. Hainan island fell to the Communists in April 1950 and the Choushan islands were evacuated by the Nationalists in May 1950, even before the First Taiwan Strait Crisis. The Matsu and Kinmen island groups, situated in the Taiwan Strait just off the coast of the Chinese mainland, were the Nationalists' first line of defense against the Communist Party of China and were heavily fortified by Chiang. The islands off the shore of Zhejiang province were seen as a foothold to recover the mainland and housed the reduced provincial government of Chiang's native province. While the United States