After the provisional capital of the Republic of China (ROC) was established in Taipei, Taiwan, on December 7, 1949, it was only natural that the government there would monitor by every means possible developments occurring on the mainland under the rule of the CCP. Nationalist government experts on Communist affairs quickly noted that Peking was relying more and more on moral and material support from the Soviet Union. Realizing that the CCP lacked sufficient naval and air force power of its own, the experts were alarmed by the possibility of a Soviet-backed Communist military invasion of Taiwan. Recognizing, too, that Communist subversion had enjoyed notable success in undermining popular support in the cities and behind the Nationalist lines on the mainland during the civil war, the leaders in Taipei feared an up-surge of Communist infiltration and sabotage on Taiwan.