1st Infantry Division (South Korea)

1st Infantry Division (South Korea)
Unit name	1st Infantry Division
Native name	제1보병사단
Caption	Shoulder sleeve insignia
Dates	15 April 1948 – present
Country	South Korea
Allegiance	Republic of Korea Armed Forces
Branch	Republic of Korea Army
Type	Infantry
Role	Ground combat
Size	Division
Command structure	I Corps (South Korea)
Garrison	Paju
Nickname	"Fierce Tiger"
Battles	Korean War, Operation Paul Bunyan

1st Infantry Division (South Korea) is a division-level formation of the Republic of Korea Army raised in 1948 and based in Paju near the Demilitarized Zone (Korea). It has been a principal component of I Corps (South Korea) and has participated in major Korean War operations, Battle of Pusan Perimeter, and Cold War-era incidents such as Operation Paul Bunyan. The division's history, organization, and deployments reflect South Korea's post-1945 security environment and alliance with the United States Armed Forces.

History

The division was activated on 15 April 1948 amid the dissolution of United Nations Command arrangements after Japanese rule in Korea and the establishment of the Republic of Korea. During the Korean War, the division fought in the Incheon Landing, the Battle of Seoul (1950), and the defense of the Naktong Line during the Battle of Pusan Perimeter, often operating alongside Eighth United States Army units such as the 24th Infantry Division (United States) and coordinating with United Nations (UN) forces. Post-armistice, the division was stationed near the Demilitarized Zone (Korea) and took part in forward defense tasks during the Cold War incidents including the Axe Murder Incident that prompted Operation Paul Bunyan with participation by ROK and United States Forces Korea. Throughout the 1990s and 2000s, the division underwent restructuring influenced by ROK Armed Forces modernization, the Armistice Agreement, and evolving threats from the Korean People's Army.

Organization and Structure

The division is subordinated to I Corps (South Korea), with a headquarters in Paju. Standard divisional elements include infantry brigades, an artillery brigade, reconnaissance, engineering, signal, logistics, medical, and military police units modeled on ROK Army organizational patterns similar to the US Army's combined-arms brigade concept. Brigade-level formations have included motorized and mechanized infantry brigades equipped to operate in the Korean Peninsula's fortified terrain and coordinate with corps-level assets such as Republic of Korea Army Aviation Command helicopters and ROK Army Special Warfare Command elements. The division's support units maintain interoperability with United States Forces Korea logistics and command-and-control systems, and participate in joint training with formations like USFK 2nd Infantry Division and multinational battlegroups during exercises such as Key Resolve and Ulchi-Freedom Guardian.

Operational Deployments and Combat Actions

Combat operations in 1950 saw the division engaged at Pusan Perimeter, the Inchon Landing, and the Third Battle of Seoul, confronting units of the Korean People's Army and elements of the Chinese People's Volunteer Army during later campaigns. Post-war incidents included responses to border clashes along the Demilitarized Zone (Korea), participation in the response to the Axe Murder Incident, and readiness operations during crises such as the Korean axe murder incident aftermath and heightened tensions following North Korean provocations like the Bombardment of Yeonpyeong and Sinking of ROKS Cheonan periods. The division has also contributed personnel to multinational exercises and ROK deployments supporting alliance commitments, interoperability initiatives with United States Forces Korea, and civil-military assistance in domestic disaster relief following typhoons or the Sampoong Department Store collapse era lessons for civil support.

Equipment and Capabilities

The division fields small arms and collective weapon systems consistent with Republic of Korea Army equipment inventories, including assault rifles, machine guns, and anti-armor systems procured from manufacturers linked to Defense Acquisition Program Administration (South Korea). Artillery assets have included tube artillery and rocket systems interoperable with corps-level fire control and counterbattery assets such as radar from Agency for Defense Development programs. Mobility is provided by APCs and IFVs compatible with K2 Black Panther and K21 Infantry Fighting Vehicle integration at corps scale, while close air support and air mobility coordination occurs with Republic of Korea Air Force and US Air Force assets. Communications and surveillance capabilities leverage national systems developed under Defense Acquisition Program Administration (South Korea) and cooperative projects with United States Department of Defense technology transfers, enabling combined-arms maneuver, reconnaissance, and electronic warfare resilience.

Commanders and Notable Personnel

Senior commanders have included career officers from the Republic of Korea Army who progressed to corps and joint staff roles within Joint Chiefs of Staff (South Korea), and some have engaged in bilateral liaison with commanders from United States Forces Korea and Eighth United States Army. Notable division leaders and staff officers have been involved in coordinating major operations during the Korean War and Cold War crises, and in later periods contributed to ROK force transformation initiatives overseen by the Ministry of National Defense (South Korea).

Garrison and Facilities

The division's garrison in Paju places it forward of the Demilitarized Zone (Korea) near strategic points such as the Han River approaches to Seoul and key highway corridors linking the Gyeonggi Province defensive belt. Facilities include brigade cantonments, maneuver ranges, artillery firing complexes, and logistics hubs designed for rapid reinforcement from Port of Incheon and rail nodes connected to the national network administered by Korea Railroad Corporation. The garrison supports combined training with United States Forces Korea and hosts joint exercises that utilize ranges and simulation centers modernized under national defense infrastructure programs.

Category:Infantry divisions of South Korea Category:Military units and formations established in 1948