Modern Korean History Portal
The Modern Korean History Portal is a learning and a research tool for students, educators, and professional historians interested in Korea and has been funded through the generous support of the Korea Foundation. (Image, Namdaemun, Seoul, Sam Garza)
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China-North Korea Relations
Are Chinese-North Korean relations really "as close as lips to teeth"?
South Korean Nuclear History
The South Korean nuclear program was one of Park Chung Hee's most controversial decisions, threatening the alliance with the United States.
The Two Koreas and the Vietnam War
With the involvement of both South and North Korea, the Vietnam War became a microcosm of the inter-Korean struggle.
Japan and the Korean Peninsula
Whether as a partner, adversary, or enemy, Japan continued to play an important role on the Korean Peninsula even after 1945.
Conversations with Kim Il Sung
Kim Il Sung ruled North Korea from 1948 until his death in 1994.
1988 Seoul Olympic Games
When South Korea was awarded the 1988 Olympic Games, North Korea began an ambitious but failed effort to act as cohost.
Korean War Origins, 1945-1950
Who started the Korean War? This collection adds context to the decisions that led to North Korea's invasion of South Korea on June 25, 1950.
Korean War, 1950-1953
When North Korean troops invaded South Korea on June 25, 1950, the inter-Korean conflict entered its most bloody phase: the Korean War
Korean War Armistice
On July 27, 1953, the Korean Armistice Agreement was signed, ceasing hostilities and bringing an end to the Korean War.
Explore all of our documents on inter-Korean relations in one comprehensive collection.
North Korean Nuclear History
Formerly secret documents from the communist word reveal that North Korea's nuclear program began as early as the 1960s.
Soviet Union-North Korea Relations
The Soviet Union was one of North Korea's most important allies through the end of the Cold War, but relations were not always cordial.
USS Pueblo Crisis
In January 1968, North Korea seized the USS Pueblo and its American crew.
The Two Koreas and the Third World
During the Cold War, the two Koreas competed for recognition and legitimacy across the Third World.
North Korean Military Adventurism
This collection of documents provides a historical record of North Korea's brinkmanship and military-diplomatic campaigns since 1968.
Repatriation to North Korea
Koreans in China, Japan, and elsewhere returned or were repatriated to North Korea throughout the Cold War.
Northern Limit Line Dispute
The Northern Limit Line (NLL) remains one of the most serious flashpoints for conflict on the Korean Peninsula.
North Korea August 1956 Plenum Incident
The post-Korean War disputes and debates within the Korean Workers' Party culminated in the 1956 August Plenum.
North Korea and the American Radical Left
In the midst of the diplomatic competition between the two Koreas, groups from the American radical left traveled to Pyongyang.
Korea at the United Nations
Until 1991, the United Nations was a key battleground in the inter-Korean struggle for legitimacy and global recognition.
The "Second" Korean War, 1967-1969
A series of military clashes taking place along the DMZ after 1967 threatened to engulf the Korean Peninsula in a new war.
United States-North Korea Relations
Enmity and hostility have characterized United States-North Korea relations since 1948, but openings for improve relations have appeared.
North Korea's First Five-Year Plan, 1957-1961
North Korea's First Five-Year Plan emphasized the development of heavy industry