Cuba ( (listen) KEW-b, Spanish: [kua] (listen)), officially the Republic of Cuba (Spanish: Repblica de Cuba [repulika e kua] (listen)), is an island country comprising the island of Cuba, as well as Isla de la Juventud and several minor archipelagos. Cuba is located where the northern Caribbean Sea, Gulf of Mexico, and Atlantic Ocean meet. Cuba is located at the east of the Yucatn Peninsula (Mexico), south of both the American state of Florida and the Bahamas, west of Hispaniola (Haiti/Dominican Republic), and north of both Jamaica and the Cayman Islands. Havana is the largest city and capital; other major cities include Santiago de Cuba and Camagey. The official area of the Republic of Cuba is 109,884 km2 (42,426 sq mi) (without the territorial waters). The main island of Cuba is the largest island in Cuba and in the Caribbean, with an area of 104,556 km2 (40,369 sq mi). Cuba is the second-most populous country in the Caribbean after Haiti, with over 11 million inhabitants.The territory that is now Cuba was inhabited by the Ciboney Tano people from the 4th millennium BC until Spanish colonization in the 15th century. From the 15th century, it was a colony of Spain until the SpanishAmerican War of 1898, when Cuba was occupied by the United States and gained nominal independence as a de facto United States protectorate in 1902. As a fragile republic, in 1940 Cuba attempted to strengthen its democratic system, but mounting political radicalization and social strife culminated in a coup and subsequent dictatorship under Fulgencio Batista in 1952. Open corruption and oppression under Batista's rule led to his ousting in January 1959 by the 26th of July Movement, which afterwards established communist rule under the leadership of Fidel Castro. Since 1965, the state has been governed by the Communist Party of Cuba. The country was a point of contention during the Cold War between the Soviet Union and the United States, and a nuclear war nearly broke out during the Cuban Missile Crisis of 1962. Cuba is one of a few extant MarxistLeninist socialist states, where the role of the vanguard Communist Party is enshrined in the Constitution. Under Castro, Cuba was involved in a broad range of military and humanitarian activities throughout both Africa and Asia.Culturally, Cuba is considered part of Latin America. It is a multiethnic country whose people, culture and customs derive from diverse origins, including the Tano Ciboney peoples, the long period of Spanish colonialism, the introduction of enslaved Africans and a close relationship with the Soviet Union in the Cold War.

Cuba is a founding member of the United Nations, the G77, the Non-Aligned Movement, the Organisation of African, Caribbean and Pacific States, ALBA, and the Organization of American States. It has currently one of the world's only planned economies, and its economy is dominated by the tourism industry and the exports of skilled labor, sugar, tobacco, and coffee. Cuba has historicallyboth before and during communist ruleperformed better than other countries in the region on several socioeconomic indicators, such as literacy, infant mortality and life expectancy.Cuba has a single-party authoritarian regime where political opposition is not permitted. There are elections in Cuba, but they are not considered democratic. Censorship of information (including limits to internet access) is extensive, and independent journalism is repressed in Cuba; Reporters Without Borders has characterized Cuba as one of the worst countries in the world for press freedom.

China, officially known as the Republic of China (ROC), was a country in East Asia based in Mainland China from 1912 to 1949, prior to the relocation of its central government to Taiwan as a result of the Chinese Civil War. At a population of 541 million in 1949, it was the world's most populous country. Covering 11.4 million square kilometres (4.4 million square miles), it consisted of 35 provinces, 1 special administrative region, 2 regions, 12 special municipalities, 14 leagues, and 4 special banners. This period is often referred to as the Republican Era in Mainland China or the Mainland Period in Taiwan.The Republic was declared on 1 January 1912 after the Xinhai Revolution, which overthrew the Qing dynasty, the last imperial dynasty of China. On 12 February 1912, regent Empress Dowager Longyu signed the abdication decree on behalf of the Xuantong Emperor, ending several millennia of Chinese monarchical rule. Sun Yat-sen, the founder and its provisional president, served only briefly before handing over the presidency to Yuan Shikai, the leader of the Beiyang Army. Sun's party, the Kuomintang (KMT), then led by Song Jiaoren, won the parliamentary election held in December 1912. However, Song was assassinated on Yuan's orders shortly after and the Beiyang Army, led by Yuan, maintained full control of the Beiyang government, who then proclaimed the Empire of China in 1915 before abolishing the short-lived monarchy as a result of popular unrest. After Yuan's death in 1916, the authority of the Beiyang government was further weakened by a brief restoration of the Qing dynasty. The mostly powerless government led to a fracturing of the country as cliques in the Beiyang Army claimed individual autonomy and clashed with each other. So began the Warlord Era: a decade of decentralized power struggles and prolonged armed conflict.

The KMT, under the leadership of Sun, attempted multiple times to establish a national government in Canton. After taking Canton for a third time in 1923, the KMT successfully established a rival government in preparation for a campaign to unify China. In 1924 the KMT would enter into an alliance with the fledgling Chinese Communist Party (CCP) as a requirement for Soviet support. General Chiang Kai-shek, who became the Chairman of the Kuomintang after Sun's death and subsequent power struggle in 1925, began the Northern Expedition in 1926 to overthrow the Beiyang government. In 1927, Chiang moved the nationalist government to Nanking and purged the CCP, beginning with the Shanghai massacre. The latter event forced the CCP and KMT's left-wing into armed rebellion, marking the beginning of the Chinese Civil War and the establishment of a rival nationalist government in Wuhan under Wang Jingwei. However, this rival government soon purged the communists as well and reconciled with Chiang's KMT. After the Northern Expedition resulted in nominal unification under Chiang in 1928, disgruntled warlords formed an anti-Chiang coalition. These warlords would fight Chiang and his allies in the Central Plains War from 1929 to 1930, ultimately losing in the largest conflict of the Warlord Era.

China experienced some industrialization during the 1930s but suffered setbacks from conflicts between the Nationalist government in Nanjing, the CCP, remaining warlords, and the Empire of Japan after the Japanese invasion of Manchuria. Nation-building efforts yielded to fight the Second Sino-Japanese War in 1937 when a skirmish between the National Revolutionary Army and Imperial Japanese Army culminated in a full-scale invasion by Japan. Hostilities between the KMT and CCP partially subsided when, shortly before the war, they formed the Second United Front to resist Japanese aggression until the alliance broke down in 1941. The war lasted until the surrender of Japan at the end of World War II in 1945; China then regained control of the island of Taiwan and the Pescadores.

Shortly after, the Chinese Civil War between the KMT and CCP resumed with full-scale fighting, leading to the 1946 Constitution of the Republic of China replacing the 1928 Organic Law as the Republic's fundamental law. Three years later, in 1949, nearing the end of the civil war, the CCP established the People's Republic of China in Beijing, with the KMT-led ROC moving its capital several times from Nanjing to Guangzhou, followed by Chongqing, then Chengdu and lastly, Taipei. The CCP emerged victorious and expelled the KMT and ROC government from the Chinese mainland. The ROC later lost control of Hainan in 1950, and the Dachen Islands in Zhejiang in 1955. It has maintained control over Taiwan and other smaller islands.

The ROC was a founding member of the League of Nations and later the United Nations (including its Security Council seat) where it maintained until 1971, when the People's Republic of China took over its membership. It was also a member of the Universal Postal Union and the International Olympic Committee.