Final answer:
The pivotal point in the Korean War where the US halted the North Korean advance was the city of Inchon. The successful amphibious invasion on September 15, 1950, known as the Inchon Landing, led to a turnaround in the war and the recapture of Seoul.
Step-by-step explanation:
The landing place where the US eventually stopped the North Korean advance during the Korean War was the coastal city of Inchon. After North Korean forces pushed south across the 38th Parallel and nearly occupied the entire Korean Peninsula, only the port city of Pusan remained in the hands of UN forces. The Inchon Landing, an amphibious invasion led by General Douglas MacArthur on September 15, 1950, was a strategic success that led to the liberation of the South Korean capital of Seoul and turned the tide of war by forcing a North Korean retreat.
The well-executed invasion at Inchon allowed UN forces to establish a secured city as a safe landing zone for troops, drive a wedge through the North Korean supply lines, and trap parts of the invading army between Seoul and Pusan, resulting in a significant number of North Korean surrenders and retreats.