Korean History › Division & Korean War › Division of Korea at the 38th parallel
Democratic People's Republic of Korea (North Korea)
founded September 9, 1948· Empire, kingdom or state· Rulers & states
Well documentedSolid records, physical evidence or scientific consensus.
North Korea, founded on September 9, 1948, in the Soviet zone, with Kim Il-sung as premier.
See it on the Korean History map →What happened
After the Soviet-backed Provisional People's Committee (1946) and People's Committee (1947), the north held Supreme People's Assembly elections in August 1948, claiming southern delegates were chosen secretly too. The Democratic People's Republic of Korea (조선민주주의인민공화국) was proclaimed September 9, 1948, with Kim Il-sung as premier and Pyongyang as working capital; its first constitution named Seoul the capital. Soviet troops left by December 1948. It became a one-party state under the Workers' Party and, later, Kim's personality cult.
Why it matters
It remains one of the world's most closed states, ruled by three generations of the Kim family, with nuclear weapons that keep the peninsula tense.
How we know
North Korean constitutions and records, Soviet archives opened in the 1990s, documents captured during the Korean War, and defectors' accounts.
Still debated
How much its founding reflected Korean choice versus Soviet design is debated, and the North's official history is heavily rewritten around Kim Il-sung.
Connections (3)
▸Kim Il-sung became the leader of Democratic People's Republic of Korea (North Korea)Well documented
The connection
Having led the north's interim committees since 1946, Kim became premier when the DPRK was proclaimed in 1948. Through purges in the 1950s he crushed rival communist factions, the Soviet Koreans, the China-linked Yan'an group and southern communists, then ruled until 1994, later as president, founding a family dynasty.
When and how
Pyongyang, September 9, 1948; premier until 1972, then president until his death on July 8, 1994.
How we know
DPRK constitutions and party records, Soviet and Chinese archives, and studies of the 1956 'August faction' crisis and purges.
Debates and open questions
How firmly he held power before the 1956 crisis, and whether Moscow or Beijing could still have replaced him, are debated.
▸Republic of Korea (South Korea) claims the same peninsula as Democratic People's Republic of Korea (North Korea)Well documented
The connection
Each state claims to be Korea's only legitimate government. South Korea's constitution defines its territory as the whole peninsula; North Korea's first constitution named Seoul its capital. They joined the UN together in 1991 and signed a basic agreement calling their tie a 'special relationship' on the way to unification, not one between foreign states.
When and how
Rival claims since 1948; joint UN entry September 17, 1991; Inter-Korean Basic Agreement, December 1991.
How we know
The texts of both constitutions, UN membership records, and inter-Korean agreements of 1972, 1991, 2000 and 2018.
Debates and open questions
Whether two states are now permanent is in question: since late 2023 North Korea has called the South a separate hostile state and dropped unification as a goal.
▸Chinese entry into the Korean War rescued Democratic People's Republic of Korea (North Korea)Well documented
The connection
By late October 1950 North Korea had lost Pyongyang and most of its territory, and Kim Il-sung's government had retreated toward the Chinese border. Chinese troops pushed UN forces back below the 38th parallel and then held a stalemate, saving the North Korean state. They stayed until 1958, and a 1961 treaty made China the North's formal ally.
When and how
October 1950 to 1953; Peng Dehuai's Chinese People's Volunteers, who withdrew in October 1958; the treaty of friendship was signed in July 1961.
How we know
Military records on all sides, and Kim's appeals for help in Chinese and Soviet archives.
Debates and open questions
How much Kim resented Chinese dominance (he purged the pro-China faction from 1956 to 1958), and why North Korean histories still downplay China's role.