China’s major counteroffensive and the UN forces’ retreat

China’s major counteroffensive and the UN forces’ retreat transformed the Korean War from an anticipated advance into a desperate withdrawal. Beginning on November 24, 1950, the Chinese attack shattered expectations of a quick victory in North Korea and placed Harry S. Truman under renewed pressure as the president answerable for the consequences of the campaign.

The offensive and its reversal

Before the attack, Douglas MacArthur had pressed for a powerful offensive that he expected would end the war quickly. On November 24, he watched the operation begin near the Chongchon River and voiced hope that the troops might be home by Christmas. Four days later, at 6:15 in the morning, General Omar N. Bradley telephoned Truman at Blair House with news from MacArthur that the situation had become grave.

Truman briefed his staff later that morning: China had launched a counterattack with 260,000 men, and MacArthur’s forces were going over to the defensive. The sudden news reversed the prospects that had followed the Inchon landing and the advance northward. What had appeared to be a campaign approaching victory had become a crisis across the United Nations line.

Retreat in the winter

The Chinese attack struck a divided force on both flanks, while severe winter weather compounded the danger. The U.S. Eighth Army, commanded by General Walton Walker, fell back from the Chongchon River toward Pyongyang. Its choice, as the account presents it, was retreat or annihilation. In the northeast, the U.S. Tenth Corps faced an even more difficult withdrawal.

The 1st U.S. Marine Division retreated roughly forty miles from the Chosin Reservoir to the port of Hungnam, where it was evacuated. Across the front, the retreat unfolded in howling winds and snow, with temperatures reaching 25 degrees below zero. The Eighth Army’s withdrawal and the Marines’ ordeal marked distinct parts of a wider United Nations retreat, as Chinese forces exploited MacArthur’s divided positions and the winter conditions to press their attack.

Truman’s responsibility and the wider danger

The reversal carried political as well as military weight for Truman. His decision to send forces beyond the 38th parallel had been his, as had the decision to risk the Inchon operation; now he faced the consequences of a campaign whose outcome had abruptly changed. When the news reached his staff, the room fell silent. The account emphasizes that those present understood he would be answerable for what happened next.

The retreat also intensified fears that the conflict could expand into a global war involving the Soviet Union. The immediate military imperative, as Dean Acheson put it, was to find a line that could be held. The counteroffensive thus brought a stark change in the war’s direction: MacArthur’s confident drive toward a quick conclusion gave way to a struggle to preserve the United Nations position and avoid a still wider conflict.