
With over one-fifth of the world's population, the majority of China exists today as a state known as the People's Republic of China, but it also refers to a long-standing civilization comprising successive states and cultures dating back nearly 5,000 years.
By the nineteenth and early twentieth centuries, however, China's political, economic, and military influence declined relative to the growing regional power of Japan and the influence of Western powers. The imperial system in China ended with the establishment of the Republic of China (ROC) under Sun Yat-sen in 1912; however, the next four decades of ROC rule were marred by warlord control, the Second Sino-Japanese War during which the Empire of Japan occupied large parts of China, and the Chinese Civil War which pitted Chinese Nationalists against the Communist forces. After its victory in the Chinese Civil War, the Communist Party of China under Mao Zedong established the People's Republic of China (PRC) in 1949, forcing the Nationalists to retreat and relocate the ROC government to the island of Taiwan, which it had governed since the end of World War II. Since then, the ROC has maintained administrative control over Taiwan, the Pescadores, several islands off the coast of Fujian province, and some islands in the South China Sea .