From mobile war to stalemate, 1950-1953

H1 History - syllabus 8838, 2027

What this lesson teaches

  • I can judge how the Cold War played out in Korea and Cuba, as the superpowers competed and looked for allies.

    Syllabus 8838, Theme I, Learning Outcomes. evaluate the manifestation of the Cold War conflict across different contexts over time

Make a guess

In October 1950 UN forces crossed the 38th parallel and advanced towards China's border. What do you think China did?

  1. Asked the USSR to send its army in instead.
  2. Stayed neutral and let Korea be reunited under the south.
  3. Sent large numbers of troops and drove UN forces back south.
Show the answer

Sent large numbers of troops and drove UN forces back south.

China had warned it would intervene. Its entry turned the war into a long stalemate near the parallel.

Inchon reversed the war, the UN advance north brought China in, and stalemate led to an armistice in 1953.

By August 1950, UN and South Korean forces were pushed into a small area around Pusan. In September, MacArthur landed at Inchon behind North Korean lines and recaptured Seoul.

In October 1950, UN forces crossed the 38th parallel and advanced towards the Yalu River, China's border. The aim had shifted from containment to rollback: reunifying Korea under the south.

China warned that it would intervene. In October and November 1950, Chinese troops entered the war in large numbers and drove UN forces back south. Mao acted to protect China's border and revolution, to support a fellow communist state, and to strengthen China's position with Stalin. The USSR gave weapons and some hidden air support but avoided open combat.

MacArthur wanted to widen the war against China. Truman dismissed him in April 1951 to keep the war limited. Front lines settled near the 38th parallel. Armistice talks began in July 1951 but dragged on, mainly over prisoners of war who did not want to go home. The armistice was signed on 27 July 1953. No peace treaty followed.

Inchon landing
September 1950.
Chinese intervention
October-November 1950.
MacArthur dismissed
April 1951.
Armistice
27 July 1953; no peace treaty.

Real examples to use

Pusan Perimeter, August-September 1950

UN and South Korean forces held a small corner in the south-east until the Inchon landing turned the war.

Chosin Reservoir, November-December 1950

Chinese forces surrounded US Marines in bitter cold, forcing a fighting retreat south.

Truce talks, from July 1951

Talks at Kaesong and then Panmunjom lasted two years, held up mainly by the question of whether prisoners could refuse to go home.

Worked example: Containment versus rollback

A question asks how US aims changed during the war.

  1. June 1950: aim to restore South Korea, which is containment.
  2. October 1950: crossing the 38th parallel to unify Korea, which is rollback.
  3. After China intervened: return to limited war and containment.
  4. MacArthur's dismissal shows Truman's choice to keep the war limited.

Watch out for this

The Korean War ended with a peace treaty in 1953.

It ended with an armistice, a ceasefire agreement. No peace treaty has been signed, and Korea remains divided.

Check your understanding

Why did China enter the war in late 1950?

  1. UN forces crossed the 38th parallel and neared China's border on the Yalu.
  2. The USSR ordered China to replace the Soviet troops already fighting there.
  3. North Korea invaded China and dragged it in.
Show the answer

UN forces crossed the 38th parallel and neared China's border on the Yalu.

Right. Mao saw a threat to China's security and revolution.

Sources and context

Background reading for this chapter.

  • Truman explains American action

    Paraphrase of President Truman's statement on the situation in Korea, 27 June 1950.

  • A secret plan for national security

    Paraphrase of NSC-68, a top secret report to the US National Security Council, 14 April 1950.

  • China's foreign minister responds to a ceasefire proposal

    Paraphrase of a statement by Chinese Foreign Minister Zhou Enlai, 22 December 1950, as cabled to the UN General Assembly President and reported by the US representative at the UN.

  • The Korean Armistice Agreement

    Paraphrase of the Korean Armistice Agreement, signed at Panmunjom, 27 July 1953.

  • Stalin replies to Kim Il-sung, January 1950

    Paraphrase of a telegram from Joseph Stalin to Terenti Shtykov, the Soviet ambassador in Pyongyang, 30 January 1950, from the Russian Presidential Archive, in the English translation published by the National Security Archive and the Cold War International History Project. Paraphrased because the translation's licence is unclear.

  • the UN Security Council acts, 27 June 1950

    Extract from United Nations Security Council Resolution 83 (1950), adopted at the Council's 474th meeting on 27 June 1950 by 7 votes to 1 (Yugoslavia). The Soviet representative was boycotting the Council. A UN record.

  • Truman's advisers meet at Blair House, 25 June 1950

    Extract from a memorandum of conversation by Ambassador at Large Philip Jessup, recording the dinner meeting of President Truman and his senior advisers at Blair House, Washington, on the evening of 25 June 1950. Top Secret. Foreign Relations of the United States, 1950, volume VII, document 86. A US government document in the public domain.

  • China's warning, October 1950

    Extract from a circular telegram from Acting Secretary of State James Webb to certain US diplomatic and consular posts, Washington, 5 October 1950, two days before American forces crossed the 38th parallel. Secret. Foreign Relations of the United States, 1950, volume VII, document 614. A US government document in the public domain. (Abbreviations as in the original telegram.)

  • MacArthur meets Truman on Wake Island, 15 October 1950

    Extract from "Substance of Statements Made at Wake Island Conference on 15 October 1950", compiled by General Omar Bradley, Chairman of the Joint Chiefs of Staff, from notes kept by the officials who came from Washington. Top Secret. Foreign Relations of the United States, 1950, volume VII, document 680. A US government document in the public domain.

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