Question: When was the last time the country colonized by Japan was united?

full_context: Document 1: Korean War: The Korean War (in South Korean Hangul: 한국전쟁, Hanja: 韓國戰爭, Hanguk Jeonjaeng, "Korean War"; in North Korean Chosungul: 조국해방전쟁, Joguk Haebang Jeonjaeng, "Fatherland Liberation War"; 25 June 1950 – 27 July 1953)[a] was started when North Korea invaded South Korea. The United Nations, with United States as the principal force, came to aid of South Korea. China, along with assistance from Soviet Union, came to aid of North Korea. The war arose from the division of Korea at the end of World War II and from the global tensions of the Cold War that developed immediately afterwards.
Document 2: Treaty on Basic Relations between Japan and the Republic of Korea: The Treaty on Basic Relations between Japan and the Republic of Korea (Japanese: ; Korean: , , "Hanil Gibon Joyak") was signed on June 22, 1965. It established basic diplomatic relations between Japan and South Korea.
Document 3: History of Korea: After the end of WWII in 1945, the Allies divided the country into a northern area, protected by the Soviets, and a southern area protected primarily by the United States. In 1948, when the powers failed to agree on the formation of a single government, this partition became the modern states of North and South Korea. The peninsula was divided at the 38th Parallel: the ``Republic of Korea ''was created in the south, with the backing of the US and Western Europe, and the`` Democratic People's Republic of Korea'' in the north, with the backing of the Soviets and the communist People's Republic of China. The new premier of North Korea, Kim il - Sung launched the Korean War in 1950 in an attempt to reunify the country under Communist rule. After immense material and human destruction, the conflict ended with a cease - fire in 1953. The two nations officially remain at war because a peace treaty was never signed. Both states were accepted into the United Nations in 1991.
Document 4: Korean War: Korea was ruled by Japan from 1910 until the closing days of World War II. In August 1945, the Soviet Union declared war on Japan and—by agreement with the United States—occupied Korea north of the 38th parallel. U.S. forces subsequently occupied the south and Japan surrendered. By 1948, two separate governments had been set up. Both governments claimed to be the legitimate government of Korea, and neither side accepted the border as permanent. The conflict escalated into open warfare when North Korean forces—supported by the Soviet Union and China—invaded South Korea on 25 June 1950. On that day, the United Nations Security Council recognized this North Korean act as invasion and called for an immediate ceasefire. On 27 June, the Security Council adopted S/RES/83: Complaint of aggression upon the Republic of Korea and decided the formation and dispatch of the UN Forces in Korea. Twenty-one countries of the United Nations eventually contributed to the defense of South Korea, with the United States providing 88% of the UN's military personnel.
Document 5: Korean War: Korea was considered to be part of the Empire of Japan as an industrialized colony along with Taiwan, and both were part of the Greater East Asia Co-Prosperity Sphere. In 1937, the colonial Governor-General, General Jirō Minami, commanded the attempted cultural assimilation of Korea's 23.5 million people by banning the use and study of Korean language, literature, and culture, to be replaced with that of mandatory use and study of their Japanese counterparts. Starting in 1939, the populace was required to use Japanese names under the Sōshi-kaimei policy. Conscription of Koreans for labor in war industries began in 1939, with as many as 2 million Koreans conscripted into either the Japanese Army or into the Japanese labor force.
Document 6: Korea under Japanese rule: Korea under Japanese rule began with the end of the short - lived Korean Empire in 1910 and ended at the conclusion of World War II in 1945. Japanese rule of Korea was the outcome of a process that began with the Japan -- Korea Treaty of 1876, whereby a complex coalition of the Meiji government, military, and business officials sought to integrate Korea both politically and economically into the Empire of Japan. A major stepping - stone towards the Japanese occupation of Korea was the Japan -- Korea Treaty of 1905, in which the then - Korean Empire was declared a protectorate of Japan. The annexation of Korea by Japan was set up in the Japan -- Korea Treaty of 1910, which was never actually signed by the Korean Regent, Gojong.
Document 7: Division of Korea: The division of Korea between North and South Korea occurred after World War II, ending the Empire of Japan's 35 - year rule over Korea in 1945. The United States and the Soviet Union each occupied a portion of the peninsula, with the boundary between their zones of control along the 38th parallel.
Document 8: Japanese war crimes: Outside Japan, different societies use widely different timeframes in defining Japanese war crimes. For example, the annexation of Korea by Japan in 1910 was enforced by the Japanese military, and the Society of Yi Dynasty Korea was switched to the political system of the Empire of Japan. Thus, North and South Korea refer to "Japanese war crimes" as events occurring during the period of Korea under Japanese rule.By comparison, the Western Allies did not come into military conflict with Japan until 1941, and North Americans, Australians, South East Asians and Europeans may consider "Japanese war crimes" to be events that occurred in 1942–1945.Japanese war crimes were not always carried out by ethnic Japanese personnel. A small minority of people in every Asian and Pacific country invaded or occupied by Japan collaborated with the Japanese military, or even served in it, for a wide variety of reasons, such as economic hardship, coercion, or antipathy to other imperialist powers.Japan's sovereignty over Korea and Formosa (Taiwan), in the first half of the 20th century, was recognized by international agreements—the Treaty of Shimonoseki (1895) and the Japan–Korea Annexation Treaty (1910)—and they were considered at the time to be integral parts of the Japanese Empire. Under the international law of today, there is a possibility the Japan-Korea Annexation Treaty was illegal, as the native populations were not consulted, there was armed resistance to Japan's annexations, and war crimes may also have been committed during the civil wars.
Document 9: Korean War: The Korean War (in South Korean Hangul: 한국전쟁; Hanja: 韓國戰爭; RR: Hanguk Jeonjaeng, ``Korean War ''; in North Korean Chosŏn'gŭl: 조국해방전쟁; Hancha: 祖國解放戰爭; MR: Choguk haebang chǒnjaeng,`` Fatherland Liberation War''; 25 June 1950 -- 27 July 1953) was a war between North Korea (with the support of China and the Soviet Union) and South Korea (with the principal support of the United States). The war began on 25 June 1950 when North Korea invaded South Korea following a series of clashes along the border. The United Nations, with the United States as the principal force, came to the aid of South Korea. China came to the aid of North Korea, and the Soviet Union also gave some assistance to the North.
Document 10: South Korea: On June 25, 1950, North Korea invaded South Korea, sparking the Korean War, the Cold War's first major conflict, which continued until 1953. At the time, the Soviet Union had boycotted the United Nations (UN), thus forfeiting their veto rights. This allowed the UN to intervene in a civil war when it became apparent that the superior North Korean forces would unify the entire country. The Soviet Union and China backed North Korea, with the later participation of millions of Chinese troops. After an ebb and flow that saw both sides almost pushed to the brink of extinction, and massive losses among Korean civilians in both the north and the south, the war eventually reached a stalemate. The 1953 armistice, never signed by South Korea, split the peninsula along the demilitarized zone near the original demarcation line. No peace treaty was ever signed, resulting in the two countries remaining technically at war. Over 1.2 million people died during the Korean War.
Document 11: Japanese colonial empire: Korea was occupied and declared a Japanese protectorate following the Japan -- Korea Treaty of 1905, and officially annexed in 1910 through the annexation treaty.
Document 12: Korea: In North Korea, China, Japan, Vietnam, and Chinese and Vietnamese - speaking areas, Korea as a whole is referred to as Chosŏn (조선, Joseon, (tɕoshʌn),, (朝鲜), Cháoxiǎn, (朝鮮), Chōsen, Triều Tiên (朝鮮) lit. ``(land of the) Morning Calm '').`` Great Joseon'' was the name of the kingdom ruled by the Joseon dynasty from 1393 until their declaration of the short - lived Great Korean Empire in 1897. King Taejo had named them for the earlier Kojoseon (고조선), who ruled northern Korea from its legendary prehistory until their conquest in 108 BC by China's Han Empire. This go is the Hanja 古 and simply means ``ancient ''or`` old''; it is a modern usage to distinguish the ancient Joseon from the later dynasty. Joseon itself is the modern Korean pronunciation of the Hanja 朝鮮 but it is unclear whether this was a transcription of a native Korean name (OC * T (r) awser, MC Trjewsjen) or a partial translation into Chinese of the Korean capital Asadal (아사달), whose meaning has been reconstructed as ``Morning Land ''or`` Mountain''.
Document 13: Korean War: Korea was ruled by Imperial Japan from 1910 until the closing days of World War II. In August 1945, the Soviet Union declared war on Imperial Japan, as a result of an agreement with the United States, and liberated Korea north of the 38th parallel. U.S. forces subsequently moved into the south. By 1948, as a product of the Cold War between the Soviet Union and the United States, Korea was split into two regions, with separate governments. Both claimed to be the legitimate government of all of Korea, and neither accepted the border as permanent. The conflict escalated into open warfare when North Korean forces -- supported by the Soviet Union and China -- moved into the south on 25 June 1950. On 27 June, the United Nations Security Council authorized the formation and dispatch of UN forces to Korea to repel what was recognized as a North Korean invasion. Twenty - one countries of the United Nations eventually contributed to the UN force, with the United States providing 88% of the UN's military personnel.
Document 14: Qing dynasty: In 1884, pro-Japanese Koreans in Seoul led the Gapsin Coup. Tensions between China and Japan rose after China intervened to suppress the uprising. Japanese Prime Minister Itō Hirobumi and Li Hongzhang signed the Convention of Tientsin, an agreement to withdraw troops simultaneously, but the First Sino-Japanese War of 1895 was a military humiliation. The Treaty of Shimonoseki recognized Korean independence and ceded Taiwan and the Pescadores to Japan. The terms might have been harsher, but when Japanese citizen attacked and wounded Li Hongzhang, an international outcry shamed the Japanese into revising them. The original agreement stipulated the cession of Liaodong Peninsula to Japan, but Russia, with its own designs on the territory, along with Germany and France, in what was known as the Triple Intervention, successfully put pressure on the Japanese to abandon the peninsula.
Document 15: Division of Korea: With the onset of the Cold War, negotiations between the United States and the Soviet Union failed to lead to an independent, unified Korea. In 1948, UN-supervised elections were held in the US - occupied south only. This led to the establishment of the Republic of Korea in South Korea, which was promptly followed by the establishment of the Democratic People's Republic of Korea in North Korea. The United States supported the South, the Soviet Union supported the North, and each government claimed sovereignty over the whole Korean peninsula.
ground_truth: in 1945
sub_queries: what nation did japan turn into a colony Answer: Korea
when was the last time Korea was united Answer: in 1945