What was the code name for the UN amphibious landing at Inchon?

The code name for the UN amphibious landing at Inchon was Operation Chromite. Conceived in 1950, the operation aimed to strike behind North Korean lines, seize the port of Inchon, and threaten Seoul while UN and South Korean troops defended the Pusan Perimeter in the southeast.

General Douglas MacArthur strongly supported the plan despite Inchon’s difficult tides, narrow channels, seawalls, and limited landing beaches. The operation began on September 15, 1950, with landings at nearby Wolmido and at Inchon itself. The surprise attack rapidly reversed the military situation.

Operation Chromite was not the name of the broader Korean War or the later fighting around Seoul. It specifically identified the amphibious assault and its immediate campaign. After Inchon was secured, UN forces advanced toward Seoul, which was recaptured later in September, while North Korean supply lines and forces in the south were placed under severe pressure.