United Nations General Assembly Resolution 2758 in the context of "Handover of Macau"

The Republic of China (ROC) was established on 1 January 1912 as a sovereign state in mainland China following the 1911 Revolution, which overthrew the Manchu-led Qing dynasty and ended China's imperial history. From 1927, the Kuomintang (KMT) reunified the country and initially ruled it as a one-party state with Nanjing as the national capital. In 1949, the KMT-led government was defeated in the Chinese Civil War and lost control of the mainland to the Chinese Communist Party (CCP). The CCP established the People's Republic of China (PRC) while the ROC was forced to retreat to Taiwan; the ROC retains control over the Taiwan Area, and its political status remains disputed. The ROC is recorded as a founding member of both the League of Nations and the United Nations, and previously held a permanent seat on the United Nations Security Council until 1971, when the PRC took the seat of China from the ROC in the United Nations General Assembly Resolution 2758. It was also a member of the Universal Postal Union and the International Olympic Committee. The ROC claimed 11.4 million km (4.4 million sq mi) of territory, and its population of 541 million in 1949 made it the most populous country in the world.

The Republic of China was officially proclaimed on 1 January 1912 by revolutionaries under Sun Yat-sen, the ROC's founder and provisional president of the new republic, following the success of the 1911 Revolution. Puyi, the final Qing emperor, abdicated on 12 February 1912. Sun served briefly before handing the presidency to Yuan Shikai, the leader of the Beiyang Army. Yuan's Beiyang government quickly became authoritarian and exerted military power over the administration; in 1915, Yuan attempted to replace the Republic with his own imperial dynasty until popular unrest forced him to back down. When Yuan died in 1916, the country fragmented between local commanders of the Beiyang Army, beginning the Warlord Era defined by decentralized conflicts between rival cliques. At times, the most powerful of these cliques used their control of Beijing to assert claims to govern the entire Republic.

The Government of the Republic of China is the national authority whose actual-controlled territory consists of main island of Taiwan (Formosa), Penghu, Kinmen, Matsu, and other island groups, collectively known as Taiwan Area or Free Area. A unitary state, the ROC government, under the current constitutional amendments, is run by a de facto semi-presidential system, consists of the presidency and five branches (Yuan): the Executive Yuan, Legislative Yuan, Judicial Yuan, Examination Yuan, and Control Yuan. The president is the head of state, with the premier as the head of government, currently ruled by the Democratic Progressive Party (DPP) since 2016. Since the 2005 amendments of the Additional Articles of the Constitution, the Legislative Yuan has been the de facto unicameral parliamentary body of the country.

Originally established in 1912 in Nanjing, the Government of the Republic of China relocated several times before finally moving to Taipei, Taiwan, in 1949 because of its military losses in the Chinese Civil War. Up until the 1990s, the government has historically been dominated by the Kuomintang (KMT) under the one-party state Dang Guo authoritarian regime, before evolving into a multi-party democracy after martial law and the climate of White Terror gradually ended. This government was the internationally recognized official government of China until 1971 by the United Nations and until 1979 by the United States.

The Republic of China Armed Forces (Chinese: 中華民國國軍; pinyin: Zhōnghuá Mínguó Guójūn; lit. 'Republic of China National Military') are the national military forces of the Republic of China (ROC), which is now based primarily in the Taiwan Area but formerly governed Mainland China prior to 1949. The armed forces comprise the Army, Navy (including the Marine Corps), Air Force, and Military Police Force. The military operates under the civilian control of the Ministry of National Defense, a cabinet-level body overseen by the Legislative Yuan.

Formerly known as the National Revolutionary Army (NRA), it was renamed the Republic of China Armed Forces in 1947 due to the implementation of the newly promulgated Constitution of the Republic of China. It was also historically referred to as the Chinese National Armed Forces (CNAF) prior to the establishment of the People's Republic of China on the Chinese mainland and the gradual loss of international recognition in the 1970s by the United Nations and many countries, including the ROC's close ally, the United States.

As a result of the surrender and occupation of Japan at the end of World War II, the islands of Taiwan and Penghu were placed under the governance of the Republic of China (ROC), ruled by the Kuomintang (KMT), on 25 October 1945. Following the February 28 massacre in 1947, martial law was declared in 1949 by the Governor of Taiwan, Chen Cheng, and the ROC Ministry of National Defense. Following the end of the Chinese Civil War in 1949, the ROC government retreated from the mainland as the Chinese Communist Party (CCP) proclaimed the establishment of the People's Republic of China (PRC). The KMT retreated to Taiwan and declared Taipei the temporary capital of the ROC. For many years, the ROC and PRC each continued to claim in the diplomatic arena to be the sole legitimate government of "China". In 1971, the United Nations expelled the ROC and replaced it with the PRC.

In 1987, martial law was lifted and Taiwan began a democratisation process, beginning with the abolition of the Temporary Provisions and culminating with the first direct president election in 1996. By 2000, the Democratic Progressive Party (DPP) came to power and began to pursue Taiwanese independence and identity.