The Korean War (1950-53) pitted the capitalist South Korea, backed by the U.S., against communist North Korea. A major offensive by South Korea ultimately led to Communist China becoming involved in the war.

Here, Victor Gamma considers how failures in the U.S. understanding of China’s intentions and over-confidence that China would not intervene led to the U.S. backed forces moving very close to the Chinese border.

You can also read Victor’s article on Henry VIII’s divorce of Catherine of Aragon here.

Fighting with the 2nd Inf. Div. north of the Chongchon River, Sfc. Major Cleveland, weapons squad leader, points out an enemy position to his machine gun crew. November 20,1950.

Fighting with the 2nd Inf. Div. north of the Chongchon River, Sfc. Major Cleveland, weapons squad leader, points out an enemy position to his machine gun crew. November 20,1950.

Seventy years ago, on June 25, 1950 the Cold War turned hot when North Korean forces launched a surprise attack across the 38th Parallel. The communist attempt to violently take-over the entire peninsula was thwarted by the firm U.S. response and General Douglas MacArthur's brilliant counterattack at Inchon that September. Now it was the turn of the U.S.-led UN and South Korean forces to attempt the unification of the Korean Peninsula on their terms. UN forces moved towards the Yalu River and victory seemed within sight. This objective, however, was shattered when massive, skillfully handled attacks by Chinese forces beginning on November 25 caused a disastrous defeat for UN forces, including the longest retreat in U.S. military history. The attacks on what the Chinese called the Western Sector came to be called the battles of the Ch'ongch'on River. These were among the most decisive in the post-World War Two era. How could the world’s premier superpower be taken by surprise? How could the nation with arguably the best intelligence-gathering capacity in the world be completely fooled? The answer is complex. It includes persistent miscalculations from the American military and political leadership, preconceived assumptions regarding communist China, ignorance regarding local conditions and China's interests, the refusal of American officials to deal with the Communist Chinese or to take their government seriously, and the on-going failure to correctly interpret intelligence.

 

Mistrust and Misunderstanding

Part of the problem can be traced to the atmosphere of heightened tension and suspicion that existed between East and West. This suspicion led to a breakdown in communications and effectively clouded understanding. The West viewed the communist world in a monolithic sense. The bickering between China and the Soviets was unknown to Western decision-makers. The Korean attack was viewed as an attempt by Russia to gain advantage and it was to the Russians the United Nations had to resist. The West's suspicions are understandable; had not Kim Il-Sung been an officer in the Red Army? Hadn't the Soviets accumulated a track record of forcing 'friendly' regimes on every state that came under their dominance? Hadn't the Red Army left behind a hardline communist state devoid of free elections in North Korea? However, documents declassified in 1992 fail to support the contention that Kim Il-Sung was merely a puppet acting under Stalin's orders. In contrast, the post-Cold War research revealed that although Stalin ultimately gave his approval and was willing to aid Kim, he was not the initiator of it. Valentin Pak, Kim's translator who read Stalin's communications to Kim, stated emphatically that Stalin did not encourage an attack on the South.

Dr. Katherine Weathersby examined declassified Soviet documents and affirmed that Stalin thought it unwise to initiate hostilities in Korea. This knowledge was unknown to U.S. policy-makers because American intelligence failed utterly to investigate the nature of the Soviet-Korean relationship. The reasons for Stalin's final go-ahead to Kim are still unclear. Whatever he may have hoped to gain by a communist victory, his contribution to the effort was relatively meager and he did not want to associate himself too closely with it.  U.S. intelligence failed completely to investigate the relationship between the Soviets and Kim. Instead, the Americans went into the conflict viewing Kim as a Soviet proxy. 

At first, China did not appear strongly concerned. The Chinese had several motives for intervening in Korea. First, they were alarmed by the rise of anti-communist sentiment in the West and thought the UN advance toward Manchuria was a military expression of this. North Korea was also deemed vital to the Chinese leadership, which had plans for large-scale industrial growth. Hydroelectric resources in North Korea were deemed essential to these plans.  U.S. officials failed to grasp these local conditions and took little interest in Korea beyond the view of Korea as merely one more piece in the massive chess game against Soviet expansionism. 

                  But rather than conduct talks with the Chinese, the animosity and mistrust that characterized East-West relations not only thoroughly poisoned any attempt at accommodation but effectively disrupted clear interpretations of Chinese or Soviet intentions. Throughout the period before open Chinese intervention (June 25 - November 25, 1950), communication between China and the West was hampered by the fact that there were no formal relations with Communist China. Any knowledge about Chinese intentions had to be gathered from reading the cables of foreign ambassadors stationed in China or by Signal Intelligence (SIGIN). The Armed Forces Security Administration (AFSA) had the responsibility for intelligence gathering. Information collected would then be passed on to the appropriate officials for evaluation. These leaders would then act on the information accordingly. There was sufficient intelligence during the summer and autumn of 1950 to alert Western officials that China had a vital interest in Korea and would back up their interests with force. China had communicated its approval of a pro-Western regime in Korea if it did not involve direct Western intervention and if it occurred at the expense of the Russians. This communication was ignored or misunderstood.  Cable traffic to and from the office of the Indian Ambassador at Beijing, Dr. Kavalm Madhava Panikkar, was being read by the Armed Forces Security Agency (AFSA). Dr. Panikkar was probably the most well informed diplomat in Beijing and had built good relations with high-ranking Chinese officials. He was thus a quite valuable source of information regarding Chinese diplomacy. In July and August 1950, cables revealed that Panikkar had been informed that China would not intervene in Korea. However, decrypted cables began to reveal a dramatic change following the Inchon landing and the turn of the tide against North Korea. For example, the cables of the Burmese ambassador now revealed that China intended to intervene militarily. A week later, on September 25, Panikkar cabled New Delhi that China would intervene if UN forces crossed the 38th Parallel. This information was transmitted to Washington, where officials dismissed it due to Panikkar's supposed pro-Chinese sympathies. Less than a week later, on October 1, 1950, Mao Tse Tung publicly declared: "The Chinese people will not tolerate foreign aggression and will not stand aside if the imperialists wantonly invade the territory of their neighbor". Mao continued by warning that if non-Korean forces crossed the 38th Parallel, the Chinese "will send troops to aid the People's Republic of Korea." That same day South Korean troops crossed the 38th parallel. Accordingly, on the following day the Chinese Politburo made the decision to intervene in Korea. Mao Tse Tung ordered 260,000 troops to cross into Korea by October 15.

 

The Die is Cast

On October 2 the Indian ambassador was roused from sleep shortly after midnight and ordered to meet with Chou En-lai, China's premier and foreign minister.  Chou informed the Indian Ambassador of China's intentions regarding Korea, which information was passed to the West on October 3. Additionally, the Dutch charge d' affaires also cabled The Hague quoting Chou en Lai's comments that China would fight if U.S. forces crossed the 38th Parallel. These warnings were dismissed in Washington as a bluff. 

Meanwhile the first U.S. forces crossed the 38th Parallel on October 5 and advanced on Pyongyang.  MacArthur had not been totally incognizant of the possibility of Chinese intervention. In fact, in the days and weeks following Inchon, he repeatedly inquired of his subordinates if any sign of Russians or Chinese had been noted. Since no reports of their presence were forthcoming, he assumed that the Soviets and Chinese had decided to withdraw at America's demonstration of will. The United Nations mandate of June 27 read in part; "furnish such assistance to the Republic of Korea as may be necessary to repel the armed attack and to restore international peace and security in the areas." It was widely held that the only way to accomplish this objective was the complete removal of the Kim regime as a threat to the south by occupying the north and reunifying the entire peninsula. 

Not everyone shared this sanguine hope, however. Several doubts about an advance into the north had been voiced. The Policy Planning Staff in Washington had also expressed grave doubts about the ability to invade the north without provoking a war with China. In addition, a National Security Council 81 report was circulated on September 1 emphasizing the risk involved but also pointed out the unlikeness of Soviet intervention. It recommended that only Republic of Korea (ROK) forces should cross the 38th Parallel. 

MacArthur harbored no such doubts, though, and the advance continued with non-Korean forces in support. On October 15 Chinese General Pen Dehuai received the order from Mao Tse Tung to begin moving his forces across the Yalu River into Korea. That night, the 372 Regiment of the 42nd Army crossed into Korea. Before long, more than 300,000 Chinese troops moved into North Korea, completely undetected by AFSA. However, other warnings did occur. SIGINT observed changes in Soviet, Chinese and North Korean military activity, indicating some kind of major operation was impending. The CIA sent a top secret coded memo (still only partially declassified) to President Truman. The memo stated that intelligence sources indicated that the Chinese would intervene to protect their interests in the Suiho Hydroelectric complex in North Korea. The memo also noted an increase in fighter aircraft in Manchuria. On October 21 AFSA reported from Chinese radio traffic that no less than three Chinese armies had been deployed along the Yalu River and reported heavy troop train movement from Shanghai to Manchuria. All of this information was dismissed because it contradicted the dominant opinions of the U.S. intelligence community. For an example of this view, an article in The Review of the World Situation dated October 18, stated: "Unless the USSR is ready to precipitate global war, or unless for some reason that Peiping does not think that war with the U.S. would result from open intervention in Korea, the odds are that Communist China, like the USSR, will not openly intervene in North Korea."  In Tokyo, Lieutenant Colonel Morton Rubin went over the intelligence indicating Chinese intentions to intervene with General MacArthur and his intelligence chief General Charles Willoughby. Neither MacArthur nor Willoughby was convinced of the reality of the threat. In fact, the UN side also suffered from an atmosphere that discouraged healthy challenges to official decisions. Surrounding MacArthur, especially after Inchon, was an aura of infallibility that effectively wilted any suggestions for greater vigilance against possible Chinese action. In this atmosphere, the disregarding of the Chinese threat became the “party line” and a healthy exchange of views was discouraged.  Matthew Ridgway, who was soon to replace MacArthur, added: "the great fault over there was poor evaluation of the intelligence that was obtained. They knew the facts but they were poorly evaluated. I don't know just why this was. It was probably in good part because of MacArthur's personality. If he did not want to believe something, he wouldn't." 

 

Now, read part 2 on how the U.S. backed forces moved ever closer to China and the eventual Chinese counter-attack here.

Why do you think many in the U.S. did not think China would join the Korean War? Let us know below.

Sources

Aid, Matthew. The Secret Sentry, the Untold History of the National Security Agency. New York: Bloomsbury Press, 2009.

Alexander, Bevin R.  Korea: The First War We Lost. New York, NY: Hippocrene Books, 1986.

Bacharach,  Deborah. The Korean War. San Diego: Lucent Books, 1991.

Conway, John Richard. Primary Source Accounts of the Korean War. Berkeley Heights: Enslow Publishers, Inc., 2006.

Fehrenbach, T.R. This Kind of War: A Study in Unpreparedness. New York: The Macmillan Company, 1963.

Halberstam, David. The Coldest Winter: America and the Korean War. New York: Hyperion, 2007.

Halberstam, David. The Fifties. New York: Fawcett Books, 1993.

Hammel. Eric Chosin: Heroic Ordeal of the Korean. New York: The Vanguard Press. 2018.

Harry S. Truman, ed. by Laura K. Egendorf. San Diego: Greenhaven Press, 2002. 

Hastings, Max. The Korean War. New York: Simon and Schuster, 1987.

Hammel, Eric. Chosin: Heroic Ordeal of the Korean. New York: The Vanguard Press,1981.

Kaufman, Burton I. The Korean War: Challenges in Crisis, Credibility and Command. McGraw-Hill Publishing Company, 1997. 

Litai, John and Xue . Uncertain Partners, (Stanford University Press), 1995.

Paul Lashmar, New Statesman & Society; 2/2/96, Vol.9 Issue 388, p24, 2p, 1bw

Truman, Harry S. Memoirs by Harry S Truman: Year of Decisions. New York: Doubleday and Company, 1955. 

Truman, Margaret, editor. Where the Buck Stops: The Personal and Private writings of Harry S. Truman. New York: Warner Books, 1989.

"Analysis: The Foreign Interventions: Stalin and USSR" www.mtholyoke.edu/~park25h/classweb/worldpolitics/analysisstalin.html‎)