n June 1960.
As the Chinese Civil War continued without truce, the government built up military fortifications throughout Taiwan. Within this effort, former KMT soldiers built the now famous Central Cross-Island Highway through the Taroko Gorge in the 1950s. The two sides would continue to engage in sporadic military clashes with seldom publicized details well into the 1960s on the nearby islands with an unknown number of night raids. During the Second Taiwan Strait Crisis in September 1958, Taiwan's landscape saw Nike-Hercules missile batteries added, with the formation of the 1st Missile Battalion Chinese Army that would not be deactivated until 1997. Newer generations of missile batteries have since replaced the Nike Hercules systems throughout the island.
During the 1960s and 1970s, the ROC maintained an authoritarian, single-party government while its economy became industrialized and technology oriented. This rapid economical growth, known as the Taiwan Miracle, was the result of a fiscal regime independent from mainland China and backed up, among others, by the support of US funds and demand for Taiwanese products. In the 1970s, Taiwan was economically the second fastest growing state in Asia after Japan. Taiwan, along with Hong Kong, South Korea and Singapore, became known as one of the Four Asian Tigers. Because of the Cold War, most Western nations and the United Nations regarded the ROC as the sole legitimate government of China until the 1970s. Later, especially after the termination of the Sino-American Mutual Defense Treaty, most nations switched diplomatic recognition to the PRC (see United Nations General Assembly Resolution 2758).
Up until the 1970s, the government was regarded by Western critics as undemocratic for upholding martial law, for severely repressing any political opposition and for controlling media. The KMT did not allow the creation of new parties and those that existed did not seriously compete with the KMT
