Incheon Landing (Operation Chromite)

Incheon Landing (Operation Chromite)
Name	Operation Chromite
Partof	Korean War
Caption	UN naval bombardment off Incheon prior to landings
Date	15–19 September 1950
Place	Incheon, Gyeonggi Province, Korea
Result	United Nations Command victory
Combatant1	United Nations (United States, United Kingdom, Australia, Canada, Turkey, Netherlands, New Zealand, France)
Combatant2	Korean People's Army (North Korea)
Commander1	Douglas MacArthur, Edward Almond, Arthur D. Struble, Chester W. Nimitz
Commander2	Kim Il-sung, Kim Chaek
Strength1	~75,000 United States Army and United States Marine Corps troops, naval and air forces
Strength2	~70,000 Korean People's Army troops in Seoul area

Incheon Landing (Operation Chromite) The Incheon Landing (Operation Chromite) was an amphibious assault conducted from 15 to 19 September 1950 during the Korean War by United Nations Command forces under Douglas MacArthur against North Korea's Korean People's Army near Incheon and Seoul. The operation aimed to relieve the besieged Pusan Perimeter, sever Korean People's Army logistics, and enable a rapid UN advance into North Korea. The landing is widely regarded as a pivotal turning point in early Korean War operations, combining United States Navy and United States Marine Corps amphibious expertise with multinational air and naval support.

Background

By August 1950 the Korean War had seen the Korean People's Army push United Nations forces into the Pusan Perimeter following the North Korean invasion of South Korea launched in June. The strategic situation prompted United Nations Command planners, influenced by Douglas MacArthur and staff at Far East Command, to consider an amphibious counterstroke to cut Korean People's Army supply routes from the north and to threaten Pyongyang and Wonsan. Earlier operations and battles including the Battle of Osan, Battle of Taejon, and Battle of the Pusan Perimeter shaped the urgency for a decisive maneuver. The tidal complexity and defended approaches to Incheon—notably Wonsan, Seoul approaches, and the Gimpo Airport area—made the plan audacious against the backdrop of United Nations Command logistics and United States Eighth Army dispositions.

Planning and decision-making

Planning for Operation Chromite was driven by Douglas MacArthur's insistence on an amphibious solution; he and staff at UN Command worked with United States Navy planners from Commander, Amphibious Force, Pacific Fleet and Joint Chiefs of Staff advisors. Proposals were reviewed in Tokyo at General Headquarters, Far East Command, with influence from commanders including Edward Almond of X Corps and Arthur D. Struble of Seventh Fleet. Intelligence assessments from Central Intelligence Agency sources and Office of Naval Intelligence analyses evaluated Korean People's Army deployments and coastal defenses at Incheon and Wonsan. Operational planners drew on amphibious precedents such as Battle of Inchon predecessors in other wars, and naval fire-support doctrine developed from World War II Pacific operations under leaders like Chester W. Nimitz and Hyman G. Rickover (naval engineering input). Controversy within staff debates involved risk assessments voiced by commanders of United States Eighth Army including Walton Walker and later Matthew Ridgway.

Forces and order of battle

The landing force consisted primarily of X Corps elements—1st Marine Division and 7th Infantry Division (United States), supported by United States Navy warships from Seventh Fleet and carrier-borne aircraft from Task Force 77. Contributing United Nations contingents included units and ships from Royal Navy, Royal Australian Navy, Royal Canadian Navy, Royal Netherlands Navy, and Royal New Zealand Navy. Air cover and interdiction were provided by Far East Air Forces assets, including F-80 Shooting Star, F9F Panther, and B-29 Superfortress bomber sorties. Amphibious shipping included attack transports, LSTs, and destroyer fire support screens. Opposing forces comprised elements of the Korean People's Army Capital Division and various NKPA regiments tasked with defending Incheon and Seoul approaches.

The landing and battle of Incheon

On 15 September 1950 UN naval units initiated pre-landing bombardment and minesweeping operations, after which amphibious waves commenced landings at Wolmido and the Incheon waterfront, supported by naval gunfire and close air support. Urban and amphibious combat involved engagements at Gimpo Airfield, Incheon Harbor, and the causeways into Seoul. Coordinated advances by 1st Marine Division and 7th Infantry Division (United States) linked with airborne and mechanized elements to exploit breaches. Key tactical actions included clearance of Wolmido island fortifications, seizure of Gimpo Airport to facilitate air operations, and rapid movement along the Han River approaches toward Seoul. Resistance from Korean People's Army units varied, with pockets of determined defense but limited capacity for organized counterattack given disrupted logistics and command.

Aftermath and strategic consequences

The success of the landing allowed United Nations Command forces to break out from the Pusan Perimeter and recapture Seoul within weeks, altering the operational balance on the peninsula. The seizure of Incheon severed Korean People's Army supply lines and forced large-scale KPA retreats and surrenders, enabling subsequent advances toward Pyongyang and into North Korea. Politically, the operation bolstered United Nations cohesion and strengthened United States influence in East Asian policy debates involving People's Republic of China considerations and Soviet Union reactions. The campaign set conditions for later confrontations including the Battle of Chosin Reservoir and the Chinese intervention in the Korean War, and influenced postwar arrangements such as armistice negotiations at Kaesong and Panmunjom.

Casualties and losses

Estimates of casualties vary among sources: United Nations forces incurred casualties among United States Marine Corps, United States Army, and naval personnel from naval gunfire, mines, and small-arms fire; Korean People's Army units suffered substantial casualties, prisoners of war, and materiel losses including artillery and transport. Civilian casualties and urban destruction in Seoul and Incheon were significant due to bombardment and house-to-house fighting, affecting postwar reconstruction and refugee flows. Precise figures are disputed in primary accounts and after-action reports from United States Eighth Army, X Corps, and Seventh Fleet archives.

Controversy and historical assessment

Operation Chromite remains debated among historians and military analysts. Proponents cite strategic audacity and operational skill by commanders such as Douglas MacArthur and naval leaders as decisive in reversing Korean War fortunes. Critics argue the operation risked overextension and provoked People's Republic of China intervention, referencing later events at Chosin Reservoir and strategic miscalculations in United Nations policy. Scholarly assessments draw on archival records from National Archives and Records Administration, memoirs by participants, and analyses in works addressing Korean War strategy and Cold War geopolitics. The landing is studied in doctrine for amphibious warfare, cited alongside historic landings like Normandy and Pacific assaults for lessons in joint operations.

Category:Operations of the Korean War Category:Battles and operations of the Korean War Category:Amphibious operations