United States Army Military Government in Korea in the context of "People's Republic of Korea"

North Korea, officially the Democratic People's Republic of Korea (DPRK), is a country in East Asia. It constitutes the northern half of the Korean Peninsula and borders China and Russia to the north at the Yalu (Amnok) and Tumen rivers, and South Korea to the south at the Korean Demilitarized Zone (DMZ). The country's western border is formed by the Yellow Sea, while its eastern border is defined by the Sea of Japan. North Korea, like South Korea, claims to be the sole legitimate government of the Korean Peninsula and adjacent islands. Pyongyang is the capital and largest city.

The Korean Peninsula was first inhabited as early as the Lower Paleolithic period. Its first kingdom was noted in Chinese records in the early 7th century BCE. Following the unification of the Three Kingdoms of Korea into Silla and Balhae in the late 7th century, Korea was ruled by the Goryeo dynasty (918–1392) and the Joseon dynasty (1392–1897). The succeeding Korean Empire (1897–1910) was annexed in 1910 into the Empire of Japan. In 1945, after the Japanese surrender at the end of World War II, Korea was divided into two zones along the 38th parallel, with the north occupied by the Soviet Union and the south occupied by the United States. In 1948, separate governments were formed in Korea: the socialist and Soviet-aligned Democratic People's Republic of Korea in the north, and the capitalist, Western-aligned Republic of Korea in the south. The North Korean invasion of South Korea in 1950 started the Korean War. In 1953, the Korean Armistice Agreement brought about a ceasefire and established a demilitarized zone (DMZ), but no formal peace treaty has ever been signed. Post-war North Korea benefited greatly from economic aid and expertise provided by other Eastern Bloc countries. However, Kim Il Sung, North Korea's first leader, promoted his personal philosophy of Juche as the state ideology. Pyongyang's international isolation sharply accelerated from the 1980s onwards as the Cold War came to an end. The fall of the Soviet Union in 1991 then brought about a sharp decline to the North Korean economy. From 1994 to 1998, North Korea suffered a famine with the population continuing to suffer from malnutrition. In 2024, the DPRK formally abandoned efforts to reunify Korea.

South Korea, officially the Republic of Korea (ROK), is a country in East Asia. It constitutes the southern half of the Korean Peninsula and borders North Korea along the Korean Demilitarized Zone, with the Yellow Sea to the west and the Sea of Japan to the east. Like North Korea, South Korea claims to be the sole legitimate government of the entire peninsula and adjacent islands. It has a population of about 52 million, of which half live in the Seoul metropolitan area, the ninth most populous metropolitan area in the world; other major cities include Busan, Daegu, and Incheon.

The Korean Peninsula was inhabited as early as the Lower Paleolithic period. Its first kingdom was noted in Chinese records in the early seventh century BC. From the mid first century BC, various polities consolidated into the rival kingdoms of Goguryeo, Baekje, and Silla. The lattermost eventually unified most of the peninsula for the first time in the late seventh century AD, while Balhae succeeded Goguryeo in the north. The Goryeo dynasty (918–1392) achieved lasting unification and established the basis for the modern Korean identity. The subsequent Joseon dynasty (1392–1897) generated cultural, economic, and scientific achievements and also established isolationism starting from the mid-17th century. The succeeding Korean Empire (1897–1910) sought modernization and reform but was annexed in 1910 into the Empire of Japan. Japanese rule ended following Japan's surrender in World War II, after which Korea was divided into two zones: the Soviet-occupied northern zone and the United States-occupied southern zone. After negotiations on reunification failed, the southern zone became the Republic of Korea in August 1948, while the northern zone became the communist Democratic People's Republic of Korea the following month.

Jeju Province (Jeju and Korean: 제주도; Hanja: 濟州道; RR: Jejudo), officially Jeju Special Self-Governing Province (Jeju: 제주특벨ᄌᆞ치도; Korean: 제주특별자치도; Hanja: 濟州特別自治道; RR: Jeju Teukbyeoljachi-do), is the southernmost province of South Korea, consisting of eight inhabited and 55 uninhabited islands, including Marado, Udo, the Chuja Archipelago, and the country's largest island, Jeju Island. The province is located in the Korea Strait, with the Korean Peninsula to the northwest, Japan to the east, and China to the west. The province has two cities: the capital Jeju City, on the northern half of the island, and Seogwipo, on the southern half of the island. The island is home to the shield volcano Hallasan, the highest point in South Korea. Jeju and Korean are the official languages of the province, and the vast majority of residents are bilingual.

Jeju Island was first settled by humans 8,000 to 10,000 years ago and the Tamna Kingdom is the earliest known civilization on the island. Beginning in the 5th century AD, the kingdom would become a tributary state of various Korean Kingdoms and briefly invaded by the Mongol Empire, before being annexed into the Goryeo in 1105 and later Joseon in 1392. Joseon ruled the island brutally and multiple uprisings occurred. Jeju Island, with the rest of mainland Korea, was annexed by the Empire of Japan in 1910. Following Japan's surrender in World War II in 1945, the islands became part of South Jeolla Province in the United States Army Military Government in Korea, before becoming a separate province on August 1, 1946. On July 1, 2006, the islands were designated a Special Self-Governing Province; it is now one of three special self-governing provinces, the others being Gangwon State and Jeonbuk State.

Syngman Rhee (Korean: 이승만; Hanja: 李承晚; pronounced [iː.sɯŋ.man]; 26 March 1875 – 19 July 1965), also known by his art name Unam (우남; 雩南), was a South Korean politician who served as the first president of South Korea from 1948 to 1960. Rhee was also the first and last president of the Provisional Government of the Republic of Korea from 1919 to his impeachment in 1925 and from 1947 to 1948. As president of South Korea, Rhee's administration was characterised by authoritarianism, limited economic development, and in the late 1950s growing political instability and public opposition to his rule.

Born in Hwanghae Province, Joseon, Rhee attended an American Methodist school, where he converted to Christianity. He became a Korean independence activist and was imprisoned for his activities in 1899. After his release in 1904, he moved to the United States, where he received degrees from American universities and met Presidents Theodore Roosevelt and Woodrow Wilson. After a brief 1910–12 return to Korea, he moved to Hawaii in 1913. In 1919, following the Japanese suppression of the March First Movement, Rhee joined the right-leaning Korean Provisional Government in exile in Shanghai. From 1918 to 1924, he served as the first President of the Korean Provisional Government until 1925. He then returned to the United States, where he advocated and fundraised for Korean independence. In 1939, he moved to Washington, DC. In 1945, he was returned to US-controlled Korea by the US military. On 20 July 1948, he was elected the first president of the Republic of Korea by the National Assembly, ushering in the First Republic of Korea.

Far East Command (FECOM) was a unified combatant command of the United States Department of Defense, active from 1947 until 1957, functionally organised to undertake the occupation of Japan and Korea. The 1st and 6th Marine Divisions (China Marines), who from 1945 to 1948 assisted the Chinese government in occupying northern China, disarming the Japanese, and helping the Kuomintang Chinese without fully getting involved in the Chinese Civil War, were not part of Far East Command and reported to Pacific Command and the U.S. Navy.

Seo Jae-pil (Korean: 서재필; Hanja: 徐載弼; January 7, 1864 – January 5, 1951), better known by his English name Philip Jaisohn, was a Korean American politician, physician, and Korean independence activist. He was the first Korean to become a naturalized citizen of the United States. He also founded the Tongnip sinmun, the first Korean newspaper written entirely in Hangul.

Jaisohn was one of the organizers of the failed Kapsin Coup in 1884. He was thus convicted for treason and sought refuge in the United States where he became a citizen and earned a medical doctorate. Upon returning to Korea in 1895, Jaisohn was offered a position as a chief advisor of the Joseon government. He declined, choosing to focus on reform movements where he advocated for democracy, Korean independence and self reliance from foreign intervention, numerous civil rights and universal suffrage. Jaisohn was forced to return to the United States in 1898, from where he participated in the First Korean Congress and advocated for the March First Movement and U.S. Government support for Korean independence. Jaisohn became a chief advisor to the United States Army Military Government in Korea after World War II and was elected as an interim representative in South Korea in the 1946 legislative election.

Presidential and vice presidential elections were held in South Korea on 20 July 1948, following the Constitutional Assembly elections in May. The president was to be elected by the members of the National Assembly, as instructed by the 1948 Constitution. Of the 198 members of the National Assembly, 196 were present for the vote. A candidate required two-thirds of the votes cast to win. Syngman Rhee was elected with 180 votes, and took over the government to oversee the transfer of power from the United States Army Military Government in Korea.

An important role was played in the run-up to the election by the dispute between Rhee and Kim Ku over the issue of establishing a separate government in the southern part of Korea, instead of including the communist-controlled north. Kim rejected the idea of separate elections, and had boycotted the Constitutional Assembly elections in May, instead campaigning for a united Korea. He also split from the National Alliance for the Rapid Realization of Korean Independence to form the Korea Independence Party. Despite Kim's refusal to take any part in a South-only government and therefore in this election, 13 members cast their votes for Kim.