The North Korean offensive and Pusan
North Korean forces advance rapidly, but the Pusan Perimeter retains a port, a logistical base and sufficient depth to receive international reinforcements.
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War
Korean War
1950 — 1953
Land, encircle, retreat: a war that refuses final decision
Military history
The strategic problem
The Korean War begins with a rapid offensive and becomes an international conflict in which the peninsula, mountains and roads impose limits on every army. The UN survives the initial collapse thanks to the Pusan Perimeter, reverses the campaign at Inchon, then discovers at Chosin and beyond that an operational victory can open a new war.
Inchon and the pursuit
The Inchon landing cuts the rear, Seoul is retaken and the North Korean army withdraws. Success drives the UN beyond the simple objective of defending the South.
Chinese intervention and limited war
Chinese intervention encircles forces at Chosin, then stabilizes a front around the 38th parallel. Fighting becomes a war of artillery and positions under nuclear and diplomatic constraint.
Explore
6 published battles, in chronological order
ChosinChinese forces encircle the Marines and American units, which open an escape route through cold and fire.InchonThe UN landing cuts the North Korean rear and, combined with the offensive from Pusan, reverses the campaign.Pusan PerimeterHow did the UN and South Korea stop retreating, supply their sectors through Busan and prevent local penetrations from joining before launching a counteroffensive?Chipyong-niHow did an isolated perimeter break the momentum of a Chinese offensive by combining all-round defence, external fire support and a relief counterattack?Imjin RiverHow did a brigade dispersed across a broad front delay a Chinese offensive while risking the isolation of its battalions?Triangle HillWhy did a limited offensive for a few heights become a battle of attrition whose cost progressively exceeded the ground's value?
Military history
Sources
Official historyUS Army Center of Military History, The Korean War
Chronologies of Inchon, Pusan, Chosin and stabilization operations.
War historyClay Blair, The Forgotten War
Command, fighting, losses and the evolution of the conflict.
Operational monographRoy E. Appleman, East of Chosin
Encirclement, routes, the UN forces’ breakout and the military significance of Chosin.