The Japanese invasion of Manchuria 1931, including the Mukden Incident, the creation of Manchukuo, the failure of the League of Nations, and the impact on Chiang Kai-shek's strategy of internal pacification first

What this dot point is asking

NESA expects you to explain how the Mukden Incident (18 September 1931) led to the Japanese seizure of Manchuria, the creation of Manchukuo, the failure of the League of Nations, and Chiang Kai-shek's choice to pursue Communists at the expense of resisting Japan. Strong answers integrate the international, Chinese, and CCP dimensions.

The answer

Manchuria before 1931

Manchuria (the three north-eastern provinces of Liaoning, Jilin, and Heilongjiang) covered around 1.3 million square kilometres with around 30 million people. Japan held the Kwantung Leased Territory (Liaodong peninsula) and the South Manchurian Railway zone since the Russo-Japanese War of 1904-1905. The Kwantung Army (a Japanese garrison of around 10,000) guarded the railway.

Manchuria was China's richest industrial region: 70 per cent of national coal output, large iron deposits, the only major heavy industry. Zhang Zuolin, the warlord ruler, had nominally aligned with the KMT in 1928. After Zhang was assassinated by the Kwantung Army (4 June 1928) his son Zhang Xueliang took over and pledged allegiance to Nanjing in December 1928.

The Mukden Incident

On 18 September 1931 Japanese officers of the Kwantung Army (Colonels Itagaki Seishiro and Ishiwara Kanji) detonated a small charge on the South Manchurian Railway just north of Mukden (Shenyang). The explosion did not even derail a train, but the Kwantung Army used the pretext to attack the Chinese garrison and seize Mukden.

The action was not authorised by Tokyo. The civilian Cabinet wanted to limit the action. The Kwantung Army ignored orders, expanded operations, and presented Tokyo with a fait accompli. The Wakatsuki Cabinet fell in December 1931; the new Inukai government was paralysed.

Conquest of Manchuria

Zhang Xueliang's forces (around 250,000) outnumbered the Kwantung Army many times over but did not resist; Chiang ordered non-resistance, gambling that internationalisation would save Manchuria. By early 1932 the Kwantung Army had taken Mukden, Changchun, Jilin, Qiqihar, and Harbin. The conquest was effectively complete by February 1932.

Manchukuo

The puppet state of Manchukuo ("Manchu State") was proclaimed on 1 March 1932. Henry Puyi, the last Qing Emperor, was installed as Chief Executive; he was elevated to Emperor of Manchukuo (in the Kangde reign era) on 1 March 1934. The real authority was the Kwantung Army's commander, who doubled as Japanese ambassador.

Japan invested heavily in Manchukuo's industrial development. The South Manchuria Railway Research Department's Five Year Plan (from 1937) developed heavy industry, mining, and chemicals. By 1944 Manchukuo's steel output exceeded Japan proper's. Around 1.5 million Japanese settlers were sent in the 1930s.

The Lytton Commission

Chiang appealed to the League of Nations under Article 11 of the Covenant on 21 September 1931. The League dispatched the Lytton Commission (chaired by the British Earl of Lytton) in early 1932. The Commission spent six weeks in Manchuria, three weeks in China and Japan, and produced its report on 1 October 1932.

The Lytton Report found:

• Japanese action on 18 September was not legitimate self-defence.
• The "self-determination" claim for Manchukuo was unfounded; the new state existed only by Japanese force.
• Manchuria should return to Chinese sovereignty under an autonomous administration, with international observers.

The League adopted the report 42-1 (Japan dissenting) on 24 February 1933. Japan walked out of the Assembly on 27 March 1933. No economic sanctions were applied; no member state was prepared to risk war over Manchuria during the Depression.

Shanghai Incident

The Kwantung Army's success encouraged the Imperial Japanese Navy. The "First Shanghai Incident" (28 January to 3 March 1932) saw Japanese marines and reinforcements attack the 19th Route Army defenders of Shanghai's Chinese district. The fighting cost perhaps 10,000 to 20,000 Chinese dead before a League-brokered ceasefire. The action revealed both Chinese capacity to resist and the limits of that resistance against modern Japanese forces.

Chiang's "internal pacification first" policy

Chiang's strategic doctrine (jiao gong, kang ri: "suppress the Communists, then resist Japan") rested on three assumptions: China was militarily too weak to fight Japan; international intervention would eventually constrain Tokyo; the CCP threat had to be eliminated to permit unified resistance.

The Tanggu Truce (31 May 1933) ceded a demilitarised zone north of Beijing. The He-Umezu Agreement (10 June 1935) and the Chin-Doihara Agreement (27 June 1935) extracted KMT troops and party organs from Hebei and Chahar provinces. Japan was creeping south.

Meanwhile Chiang spent the years 1932 to 1934 on the Encirclement Campaigns against the Jiangxi Soviet. The contradiction was politically costly.

CCP response

Mao and the CCP leadership called for a war of national resistance from August 1935 (the "August First Declaration"). After the Long March arrived in Shaanxi (October 1935), the CCP positioned itself as the patriotic alternative to Chiang's appeasement. The strategy paid off in the Xi'an Incident (December 1936) when Zhang Xueliang's troops mutinied against Chiang and forced agreement to a Second United Front.

Timeline 1928-1935

Historiography

Rana Mitter (The Manchurian Myth, 2000) is the standard study of the regional and Chinese response.

Akira Iriye (After Imperialism: The Search for a New Order in the Far East 1921-1931, 1965) places Manchuria as the moment the Washington Conference order collapsed.

Marius Jansen (The Making of Modern Japan, 2000) is rigorous on the Kwantung Army's autonomy from Tokyo.

Sandra Wilson (The Manchurian Crisis and Japanese Society, 2002) shows how the crisis radicalised Japanese domestic politics.

Jonathan Spence (The Search for Modern China, 3rd edn 2013) supplies the standard Anglophone synthesis.

How to read a source on this topic

Sources include the Lytton Report extracts, Chinese student protest leaflets, Japanese newsreel of the Manchukuo proclamation, and Chiang's "Last Statement on Mukden" speeches. Three reading habits.

First, separate Tokyo from the Kwantung Army. The Mukden Incident was insubordination; the civilian government was overrun by its own army.

Second, distinguish League rhetoric from League action. The Lytton Report condemned Japan; no member was willing to enforce. This is the precedent for Abyssinia, Rhineland, and Czechoslovakia.

Third, watch what Chiang's non-resistance order signalled. Many Chinese students saw it as treason; the December 9 Movement of 1935 in Beijing was the public response.

Common exam traps

Treating Manchuria as a side issue. It was the largest war China had seen since the Boxer Rebellion, an area the size of France and Germany combined, and the first major collective-security failure.

Confusing the Mukden Incident (1931) with the Marco Polo Bridge Incident (1937). Mukden led to Manchukuo; Marco Polo led to the full-scale Sino-Japanese War.

Forgetting the CCP angle. The Third Encirclement Campaign against Jiangxi was aborted in September 1931 because Chiang had to redeploy north. The Long March is unthinkable without Manchuria's prior disruption of KMT strategy.

In one sentence

The Mukden Incident (18 September 1931) and the Kwantung Army's seizure of Manchuria gave Japan an industrial heartland larger than France and Germany combined under the puppet state of Manchukuo (March 1932), destroyed the credibility of the League of Nations when the Lytton Report (October 1932) produced no sanctions, and locked Chiang Kai-shek into the "internal pacification first" strategy that postponed resistance to Japan until the Xi'an Incident of December 1936 forced a change of course.