Central Plains War

• 1. Introduction

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  The Central Plains War drew more than one million soldiers into the heart of China. The fighting spread across Henan, Shandong, and Anhui between 1929 and 1930. It was the largest conflict of the Warlord Era. It was also fought not against foreign invaders but against men who had unified the country just two years earlier. Three of the coalition's major commanders, Yan Xishan, Feng Yuxiang, and Li Zongren, had all marched alongside Chiang Kai-shek during the Northern Expedition. What turned those alliances into open war? And how did the resolution of this conflict help set the stage for catastrophes far larger than itself?

• 2. Chiang's Rise to Power

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  Chiang Kai-shek's political standing within the Kuomintang was initially lower than that of Hu Hanmin and Wang Jingwei. His visibility grew from 1917 onward, first during the Constitutional Protection Movement and then as the Guangzhou government took shape. He demonstrated military aptitude that distinguished him from purely civilian rivals.

  Chen Jiongming's rebellion against Sun Yat-sen in Guangzhou in 1923 proved decisive. Chiang's role in helping Sun retreat from the city earned him a position of deep personal trust. That bond endured until Sun's death in 1925, at which point factional rivalries inside the Kuomintang broke into the open.

  Wang Jingwei emerged as Chiang's main rival for control of the party. Chiang used his authority as commandant of the Whampoa Military Academy to consolidate influence, and eventually forced Wang into exile overseas. By 1926, he had been chosen as commander of the National Revolutionary Army. The Northern Expedition that followed established his standing as the republic's primary military figure. The alliances forged during that campaign, however, carried within them tensions that the demilitarization conferences of 1929 would bring fully into the open.

• 3. The Nanjing Conferences

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  On the 1st of January 1929, the National Demilitarization Conference opened in Nanjing. Chiang Kai-shek, Yan Xishan, Li Zongren, and Feng Yuxiang gathered at the table, with Chiang named as chairman. The stated goal was to reduce China's enormous military establishment through negotiated demobilization.

  China's forces at the time totaled roughly 1,502,000 men. The proposed national army would shrink that to 65 divisions of 11,000 men each, around 715,000 soldiers in total. A second conference in August divided the country into six military regions, each aligned broadly with the territory a major warlord already held. Yan Xishan and Feng Yuxiang saw the arrangement differently. They charged that Chiang was engineering the process to concentrate military command under his own authority. The accusations hardened quickly. By March 1929, the Guangxi clique had already severed relations with the Nanjing government.

• 4. The Coalition Gathers

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  Feng Yuxiang held three provinces: Gansu, Shaanxi, and Henan. His partial grip on Shandong brought in revenue his forces depended on, but a famine and rebellion in Gansu had strained his position. He asked Chiang for additional territory. Chiang responded by offering him land in Shandong in exchange for neutrality during the confrontation with the Guangxi clique. That neutrality proved temporary.

  By May 1929, Feng had also clashed with Chiang. In November, Li Zongren and Wang Jingwei issued a joint declaration forming an anti-Chiang coalition. December brought Tang Shengzhi and Zhang Fakui into the same coalition. The Nanjing government expelled Wang Jingwei from the party. The coalition answered by establishing a rival Kuomintang government in Beijing, a direct challenge to Nanjing's claim to represent the nation.

  February 1930 brought the moment of fullest consolidation. Yan Xishan demanded Chiang's resignation from the Kuomintang and was refused. Yan then assumed the coalition's leadership, with Li Zongren and Feng Yuxiang aligned behind him. Zhang Xueliang, whose Northeast Army held Manchuria, declared loyalty to Chiang. He declined to intervene actively in the fighting that followed.

  Muslim leaders in Gansu province, including Ma Tingrang, Ma Zhongying, and Ma Fuxiang, had broken with Feng Yuxiang in 1928. Their forces stayed loyal to the Nanjing government throughout the war, drawing Feng's attention away from the Central Plains at a critical moment.

• 5. War Across the Plains

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  On the 11th of May 1930, Chiang Kai-shek's Central Army launched general offensives against Yan Xishan and Feng Yuxiang. Following the Longhai Railway westward from Xuzhou, his forces had reached the outskirts of Kaifeng in Henan province by the 16th of May.

  The first major reversal came in Gansu. The Northwest Army crushed a Central Army force led by Chen Cheng by the end of May. Chiang himself narrowly escaped capture. The Northwest Army could not press its advantage, however, because the Shanxi Army arrived too slowly to follow up the victory. The Northwest Army turned to defense. At Kaifeng, Northwest Army units repelled further attacks and inflicted heavy casualties on Chiang's forces.

  The largest battle of the war unfolded at Xuzhou. Shanxi and Northwest Army forces struck together, and combined casualties on both sides exceeded 200,000. The Shanxi Army subsequently retreated from Jinan and took additional losses crossing the Yellow River northward.

  Li Zongren and Bai Chongxi led the Guangxi Army northward in the southern battlefields, capturing Yueyang. Chiang's forces moved to cut them off from behind, eventually forcing the Guangxi Army to withdraw to its home province. In Shandong, the Shanxi Army seized Jinan on the 25th of June 1930. A Nanjing counteroffensive launched from Qingdao retook the city on the 15th of August. Through the end of August and into early September, the Central Army pressed a final offensive against the Northwest Army. The largest force still uncommitted belonged to Zhang Xueliang in Manchuria.

• 6. Zhang Xueliang Intervenes

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  On the 18th of September 1930, Zhang Xueliang abandoned his declared neutrality and aligned the Northeast Army with Nanjing. The Northeast Army entered the North China Plain through Shanhai Pass. Peking fell to them two days later.

  The Shanxi Army, confronted by this new force from the north, withdrew to positions north of the Yellow River. The Northwest Army collapsed. The coalition's will to fight dissolved with it.

  On the 4th of November 1930, both Yan Xishan and Feng Yuxiang announced their resignations from all their positions. Chiang Kai-shek had entered the crisis as one of several powerful figures competing to define the republic. He emerged from it as its confirmed paramount leader. What victory had cost the republic's finances and its northern borders was a question the years immediately ahead would answer.

• 7. Long Shadows

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  The Nationalist government's victory came at a steep financial cost. Resources consumed by the war against former allies were not available for the Encirclement Campaigns Nanjing was mounting against the Chinese Communist Party. That constraint shaped what Chiang could realistically pursue in the years immediately after.

  For Zhang Xueliang, the more immediate consequence was geographic. Moving the Northeast Army into central China had significantly weakened the defenses of Manchuria. That weakening contributed to the conditions that enabled the Mukden Incident and the Japanese aggression that followed.

  Kuomintang regional factions retained their organizational structures and loyalties even after the fighting stopped. The divisions between Nanjing's direct forces and the wider network of regional cliques had not been settled, only deferred. Those deferred divisions proved costly during the Second Sino-Japanese War and resurfaced as fault lines in the Chinese Civil War that followed.