Records of Chinese people developing Taiwan in earlier periods are found in many historical documents. Beginning from the mid 12th century, the Chinese governments of different dynasties set up administrative bodies to exercise jurisdiction over Taiwan. The social development of Taiwan continued according to Chinese cultural traditions even during its occupation by Japan after the war of 1894. The Chinese government restored its administrative organs in Taiwan Province after victory in the War of Resistance Against Japan in 1945. On the eve of the founding of the PRC in 1949, the Kuomintang authorities retreated from the mainland to Taiwan. In 1950, the Korean War broke out, and the Untied States dispatched its Seventh Fleet to invade Taiwan and the Taiwan Straits. In 1954, the government of the United States and the Taiwan authorities signed a ¡°Mutual Defense Treaty,¡± bringing about the separation of Taiwan from the mainland.