On September 20, 1945, the U.S. Military Government Office was established in Seoul to take charge of security and administration in areas south of the 3.8-line.

The first commander was Lt. Gen. J. R. Hodge, commander of the 24th U.S. Army.

The U.S. military government transferred administrative power to the South Korean government established on August 15, 1948, after implemented legislative and administrative functions.

Donguibogam is an encyclopedia that brings together Chinese and Korean medical books under the orders of Heo Jun (1539-1615).

It was compiled in 1596 (the 29th year of King Seonjo's reign) and completed in 1610 (the 2nd year of King Gwanghae's reign), and is considered to have integrated medicine at that time.

It is the "Donguibogam," which is still considered a global agenda.

In July 2009, it was the first Oriental medical book to be listed as a UNESCO Memory of the World and was promoted from the National Treasure to the National Treasure in 2015, 402 years after its publication.

It was established in 1988 to commemorate the successful hosting of the 24th Seoul Olympics, to sublimate and develop the spirit of human harmony and world peace, and to realize the peace of the divided Korean people.

The Seoul Peace Prize Foundation, which was established with 10 billion won out of the surplus for the Seoul Olympics, is in charge of hosting and awarding the event.

The award is given every two years to individuals or organizations that have greatly contributed to human harmony and world peace in all areas of the world, transcending the nation, race, religion, and ideology.

The first winner of the 1990 Seoul Peace Prize was IOC President J. A. Samaranch, who was awarded a certificate of merit and $300,000 in prize money.

Since the first cholera case was reported in Busan in September 1963, the number of patients has been increasing by an average of 30 per day.

By October, more than 1,000 patients were reported across the country, of which more than 70 died. In response, the government set up a quarantine headquarters for cholera and conducted public disinfection and vaccinations.

In addition, measures were taken to block ports, close schools at various levels, ban rallies, and prohibit access to areas where patients occurred. Cholera is an infectious disease of the digestive system caused by vibrio cholera, and the main symptoms are severe vomiting and diarrhea.

According to the article at the time, not eating raw food and not drinking cold water were the first measures to prevent cholera.

On August 24, 1992, China and South Korea established formal diplomatic relations.

From September 27 to 30, 1992, South Korean President Roh Tae-woo was the first Korean head of state to visit China at the invitation of Chinese President Yang Sang-gon.

Through the summit, the two countries discussed ways to promote Sino-Korean relations and cooperate for peace and prosperity in Northeast Asia.

On September 28, 1982, a groundbreaking ceremony for the Han River Comprehensive Development Project was held at the Yeouido High Water Park.

The project has refurbished a 36km-long stream from Amsa-dong in Gangdong-gu to Haengju Bridge, and created leisure facilities and civic parks.

The construction was completed in 1986, with a total construction cost of 956 billion won.

On October 6, 1999, Incheon Subway Line 1 opened, connecting Gyulhyeon-dong (Gyulhyeon Station) in Yeonsu-gu and Dongchun-dong (Dongmak Station) by 24.6km.

As a result, Incheon was operated for the fourth time in the country after Seoul, Busan, and Daegu.

On October 10, 1993, a ferry-ho in the West Sea sank in Wido, Buan-gun, Jeollabuk-do.

The ship flying between Buan and Gupo carried 362 passengers, more than 221 passengers at the time of the accident, and weighed 110 tons.

The accident caused a gust of wind in the sea, turning the head of the ship and returning to the port, killing 292 people.

On October 15, 1973, the completion ceremony of the Soyang River Multipurpose Dam was held in Chuncheon, Gangwon-do.

The Soyang River Dam is Korea's largest multi-purpose dam with a length of 530 meters, a height of 123 meters, and a reservoir of 2.9 billion tons, and is a four-purpose dam made of sand and gravel.

It can prevent floods and droughts in the Han River basin, supply various water, and supply power to power generation facilities built together next to the dam.

At that time, the power generation of the Soyang River Dam was about one-third of the nation's total hydroelectric power.

The construction was called the three major civil engineering works along with Gyeongbu Expressway and Seoul Subway Line 1. The construction began in 1967 and was completed in about six years.

On October 17, 1972, a constitutional amendment was declared to dissolve the National Assembly and suspend political party activities under the emergency martial law.
The president elected by indirect election and removed the presidential term limit.
The president was given the right to appoint one-third of lawmakers, to take emergency measures and to dissolve the National Assembly. It was the most undemocratic constitution in history with the Yushin Constitution, which guarantees the president's permanent power and super-constitutional authority.

The Korean Independence Army unit, led by General Kim Jwa-jin's Northern Route Army and the Korean Independence Army led by Hong Beom-do, destroyed the Japanese military's godfather in Manchuria.

The ambush was the main cause of the battle, in which only thousands of independence fighters and tens of thousands of Japanese troops fought, leaving more than 90 people dead, but more than 3,500 Japanese soldiers lost their lives.

The Battle of Cheongsan-ri was recorded as the most brilliant battle in the history of the Korean armed independence movement.

On October 26, 1979, President Park Chung-hee had a banquet with Kim Jae-gyu (金~, 1926~1980), chief of staff Kim Gye-won ( 19, 1923~2016), and chief of security Cha Ji-cheol (7, 1934~1979), who were at odds with Cha Ji-cheol, at the reception hall in Gungjeong-dong after the opening ceremony of the Dangjin radio station and the completion ceremony of the Sapgyocheon seawall. As a result of the October 26 incident, the 18-year-old Park Chung-hee administration ended.

On October 26, 1909, Ahn Jung-geun killed Hirobumi Ito of Japan who visited Harbin to discuss the right to construct the Manchurian railway and the annexation of the Korean Peninsula.

Ahn Jung-geun was executed on March 26, 1910 after being arrested by a Russian military police for shouting "Hurrah for the Republic of Korea" at the scene.

Ahn Jung-geun (from September 2, 1879 to March 26, 1910) is a soldier of the Korean Empire, commander of the anti-Japanese righteous army and political thinker.

The Korean Red Cross is a non-profit special corporation in South Korea.

Since the establishment of the Korean Empire Red Cross in 1905 under the Imperial Emperor Gojong's edict, we have been sharing the moment of Korea's historic transition.

On September 28, 1955, he joined the International Federation of Red Cross and Red Cross as the 74th member.

By the side of the independent forces that struggled to regain their homeland, by the young men who cried out for democracy, by our neighbors struggling with disasters and accidents, and by the countless people who had to bear the weight of life, together have sought hope and overcome hardships and adversity.

On November 7, 1978, the founding ceremony of the ROK-US Combined Forces Command was held at the U.S. military base in Yongsan, Seoul.

The ROK-US Combined Forces Command is a military command that integrates and directs South Korean and U.S. troops stationed in South Korea, and is tasked with suppressing aggression against South Korea and jointly responding to the outbreak of war.

With the establishment of the ROK-US Combined Forces Command, South Korea's operational control, which had been exercised by the United Nations Command since the Korean War, was transferred to this command, and Korea officially regained its peacetime operational control in December 1994.