346 YALU RIVER 1950-51: The Chinese Spring the Trap on MacArthur

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Following the Inchon landings and the breakout from the Pusan Perimeter, UN forces crossed the North Korean border on 9 October and moved on the capital Pyongyang. Many in America believed the war would be over by Christmas, but some Washington diplomatic, military, and intelligence experts continued to raise dire warnings that the People's Republic of China might intervene.

Nevertheless, General MacArthur decided to push on to the Chinese/North Korean border, the Yalu River. On 25 October, Communist Chinese Forces unexpectedly attacked Republic of Korea forces near Unsan. Then, on 25 November, the day after MacArthur announced a 'final offensive to end the war,' the Chinese 13th Army Group struck in mass against the Eighth Army in the north-west corner of North Korea, overrunning the US 2nd and 25th Infantry Divisions.

The Chinese attacks quickly shattered Truman's dream of a unified Korea. American, UN, and ROK forces could not hold a successful defensive line against the combined CCF and NKPA attacks. At the Chosin Reservoir, US Marine Corps and Army units retreated south whilst MacArthur's forces withdrew from Pyongyang and X Corps later pulled out of Hungnam.