Conflict15 September 1950
Incheon Landing
UN forces under MacArthur landed at Incheon, cut North Korean supply lines and turned the course of the war.

SSgt. W. W. Frank · Public domain · Source
On 15 September 1950, while the Nakdong perimeter held, UN and South Korean forces under UN commander Douglas MacArthur landed at Wolmido, Incheon. Despite objections over the extreme tides, the operation succeeded.
With North Korean supply lines cut, the forces on the Nakdong front went over to the offensive.