Sejong City

The Battle of Taejon (16–20 July 1950) was an early battle of the Korean War, between U.S. and North Korean forces. Forces of the United States Army attempted to defend the headquarters of the 24th Infantry Division. The 24th Infantry Division was overwhelmed by numerically superior forces of the Korean People's Army (KPA) at the major city and transportation hub of Taejon, now spelled as Daejeon. The 24th Infantry Division's regiments were already exhausted from the previous two weeks of delaying actions to stem the advance of the KPA. The entire 24th Division gathered to make a final stand around Taejon, holding a line along the Kum River to the east of the city. Hampered by a lack of communication and equipment, and a shortage of heavy weapons to match the KPA's firepower, the outnumbered, ill-equipped and inexperienced U.S. forces were pushed back from the riverbank after several days before fighting an intense urban battle to defend the city. After a fierce three-day struggle, the U.S. withdrew. Although they could not hold the city, the 24th Infantry Division achieved a strategic victory by delaying the North Koreans, providing time for other U.S. divisions to establish a defensive perimeter around Pusan further south. The delay imposed at Taejon probably prevented a U.S. rout during the subsequent Battle of Pusan Perimeter. During the action, the KPA captured Major General William F. Dean, the commander of the 24th Infantry Division, and highest ranking U.S. prisoner during the Korean War.

The Sejong National Research Complex is a campus of four research buildings housing ten research institutes. Institutes started to relocate to the complex in 2014. It neighbors the Korea Institute of Public Finance (ko), Korea Legislation Research Institute (ko), and the Korea Research Institute for Human Settlements (ko) and is approximately 1.6 kilometers away from the Korea Development Institute.

Miho River (Korean:미호강 / 美湖江), a tributary of Geum River, is a river beginning in Eumseong in Chungcheongbuk-do. Its length is about 37.5 km

Yeongi County (Yeongi-gun) was a county in South Chungcheong Province, South Korea now part of Sejong. Yeongi County was abolished as this area was incorporated into Sejong City as of 1 July 2012. Jochiwon is the main city within Yeongi.

The Chaplain–Medic massacre took place in the Korean War on July 16, 1950, on a mountain above the village of Tuman (current Duman-ri, Geumnam-myeon, Sejong City). Contrast to U.S. Army's official history, South Korean local natives claimed that it took place on a mountain above the village of Yongdam-ri, which is next to Duman-ri. Thirty unarmed, critically wounded United States Army (US) soldiers and an unarmed chaplain were murdered by members of the Korean People's Army (KPA) during the Battle of the Kum River. Operating at the Kum River, troops of the US 19th Infantry Regiment, 24th Infantry Division, were cut off from resupply by a roadblock established by KPA troops of the 3rd Division. The roadblock proved difficult to break, and forced US troops to move through nearby mountains to evacuate their wounded. Thirty critically wounded US troops were stranded at the top of a mountain. Attended to by only two non-combatants, a chaplain and a medic, the wounded were discovered by a KPA patrol. Though the medic was able to escape, the KPA executed the unarmed chaplain as he prayed over the wounded, then killed the rest of them. The massacre was one of several incidents that led US commanders to establish a commission in July to look into war crimes during the war. The same month, the KPA commanders, concerned about the way their soldiers were treating prisoners of war, laid out stricter guidelines for handling enemy captives. Other than this change, the historiography of the incident in North Korean sources is largely unknown; as a result, sources detailing the incident are almost exclusively from the United States and other United Nations allies.

The Agency for Defense Development (ADD, Korean: 국방과학연구소; Hanja: 國防科學硏究所) is the South Korean national agency for research and development in defense technology, funded by the Defense Acquisition Program Administration (DAPA). It was established in August 1970 under the banner of the self-reliant national defense promoted by President Park Chung Hee.Its purpose is contributing to enforcing the national defence, to improving the national R&D capacity, and to fostering the domestic defense industry. ADD focuses on core weapons systems and core technology development, and studies major weapons platforms in high-risk and non-economical fields, unmanned and advanced, and new weapon systems for the future. ADD is responsible for first South Korean ballistic missile Nike Hercules Korea-1 aka White/Polar Bear, developed in the 1970s with its first successful test in 1978.ADD is the operator of South Korea's first dedicated military satellite, ANASIS-II, launched on 20 July 2020 by a Falcon 9 rocket.

Naepan station is a signal box on the Gyeongbu Line in Yeondong-myeon, Sejong City, South Korea.

RAON is a South Korean particle physics laboratory within the Rare Isotope Science Project (RISP) that is being constructed in the outskirts of Daejeon neighboring Sejong, South Korea by the Institute for Basic Science (IBS). It was expected to be finished by 2021 before getting pushed back to 2025.

Bugang station is a railway station on the Gyeongbu Line in Bugang-myeon, Sejong City, Republic of Korea.

Banseok station (Korean: 반석역; Hanja: 盤石驛) is a station of the Daejeon Metro Line 1 in Banseok-dong, Yuseong District, Daejeon, South Korea.

The High-Flux Advanced Neutron Application Reactor (HANARO) (하나로) is a 30 MW multi-purpose research reactor located at Daejeon, Republic of Korea. It was designed by Korea Atomic Energy Research Institute (KAERI) as a facility for research and development on the neutron science and its applications. HANARO has been playing a significant role as a national facility in the area of neutron science, the production of key radioisotopes, material testing for power reactor application, neutron transmutation doping (NTD), neutron activation analysis, and neutron radiography. After the installation of a cold neutron source in 2010, it has been also serving as a regional and international facility for neutron science.

Armed Forces Nursing Academy is a college located in Yuseong-gu, Daejeon, South Korea.