ConflictOctober 1950
Chinese Intervention
Chinese forces crossed the Yalu and entered the war, driving South Korean and UN forces south again; the eastern front withdrew by sea from Hungnam.
Photo by Corporal Peter McDonald, USMC · Public domain · Source
As UN forces neared the Yalu, Chinese troops entered the war in October 1950. Under their massive offensives, South Korean and UN forces gave up Pyongyang and fell back south of the 38th parallel.
In December, South Korean and UN troops on the eastern front were evacuated by sea from Hungnam together with refugees (the Hungnam evacuation).