Operation Chromite

Operation Chromite
US Navy · Public domain · source
Conflict	Operation Chromite
Partof	Korean War
Date	September 15–19, 1950
Place	Incheon, Korea
Result	United Nations Command victory
Combatant1	United States South Korea United Kingdom Australia Canada Turkey New Zealand
Combatant2	North Korea Korean People's Army
Commander1	Douglas MacArthur Omar Bradley Matthew Ridgway Edward Almond John J. Pershing
Commander2	Kim Il-sung Choe Yong-gon
Strength1	Amphibious forces from United States Navy United States Marine Corps United States Army
Strength2	Korean People's Army defenders at Inchon

Operation Chromite

Operation Chromite was the amphibious assault at Incheon during the Korean War in September 1950. Orchestrated by Douglas MacArthur under United Nations Command, the operation aimed to outflank the Korean People's Army and relieve the besieged Pusan Perimeter. Its success precipitated a rapid counteroffensive that altered the course of the Korean War and reshaped East Asian geopolitics.

Background

By summer 1950 the Korean War had produced a stalemate around the Pusan Perimeter after the Invasion of South Korea by Korean People's Army forces. The United Nations Command sought a decisive maneuver to reverse the North Korean advance and protect Seoul, the capital of South Korea. Douglas MacArthur, Supreme Commander of United Nations Command and former Supreme Commander for the Allied Powers in Japan, advocated a bold amphibious operation at Incheon to sever KPA supply and communication lines and to threaten the rear of the forces engaged at Pusan. Proponents cited precedent from Allied amphibious operations such as Operation Overlord and lessons from Pacific War landings involving the United States Marine Corps.

Planning and preparation

MacArthur tasked planners from United States Eighth Army and United States Navy with detailed studies of Incheon's tidal range, narrow channels, and urban defenses. The planning staff included officers from United Nations Command, Far East Command, and naval amphibious experts who examined maps of Wonsan, Gosan, and adjacent islands. Intelligence was gathered by Central Intelligence Agency and Far East Air Forces reconnaissance, while ruses involved units drawn from X Corps and diversionary bombardments by Task Force 90 and carrier aircraft from United States Seventh Fleet. Planners coordinated with commanders from Republic of Korea Army and consulted amphibious doctrine influenced by operations at Iwo Jima and Guadalcanal. Logistic preparations marshaled transports, LSTs, destroyers, and naval gunfire support assets, and assembled landing craft and Marine Corps assault contingents for a meticulously timed ingress to the Incheon beaches.

Execution and landings

The landings commenced on September 15, 1950, with preliminary bombardments by United States Navy cruisers and destroyers and air strikes from United States Air Force and carrier-based aircraft from Task Force 77. Assault units from X Corps and 1st Marine Division moved ashore amid challenging tidal conditions and fortified seawalls. Urban fighting in the approaches to Incheon and adjacent islands required coordination between infantry, armor from United States Army units, and naval gunfire. Diversionary actions at Kangnung and feints toward Wonsan diverted Korean People's Army attention. Despite concerns about strong currents and limited approches, the combined-arms assault achieved lodgments on key piers and airfields, enabling rapid sortie of reinforcements and materiel to consolidate the beachhead.

Battle of Inchon and aftermath

Following the initial assault, United Nations forces pushed to seize critical objectives including the Kimpo Airfield and executed rapid advances toward Seoul. Urban combat and street-to-street fighting ensued as UN formations engaged elements of the Korean People's Army and local militia in defensive positions. The fall of Seoul to UN forces occurred within days, causing disruption of North Korean logistics and command-and-control networks. The successful breakout from the Incheon beachhead facilitated link-up operations with units breaking out from the Pusan Perimeter during the UN counteroffensive. Prisoners and captured materiel revealed overstretched Korean People's Army lines, allowing UN commanders to mount an aggressive pursuit northward across the 38th Parallel.

Strategic impact and consequences

The amphibious operation at Incheon transformed the Korean War by enabling UN forces to transition from defensive operations to an expansive counteroffensive that recaptured much of South Korea and penetrated into North Korea. The operation demonstrated the effectiveness of amphibious warfare and joint operations among United States Navy, United States Marine Corps, United States Army, and multinational United Nations contingents, influencing subsequent doctrine in NATO and allied planning. Politically, the success strengthened Syngman Rhee's position in South Korea and intensified diplomatic debates among United Nations member states, People's Republic of China, and Soviet Union over the conduct and objectives of the conflict. The advance toward the Yalu River and ensuing Chinese intervention in Korea altered the strategic environment, leading to protracted fighting and eventual negotiations culminating in the Armistice Agreement.

Category:Korean War