Actions in Inner Mongolia (1933–1936)

By the time the Anti-Japanese Allied Army had been established, the Kwantung Army strengthened its defenses at Dolonnur. The city was garrisoned by over 2,000 men of the Japanese 4th Cavalry Brigade and an artillery unit. Outside the city, the Japanese erected 32 blockhouses connected with trenches, a wire communications network, and multiple lines of obstacles. These outer defenses were guarded by Manchukuo troops under the command of Li Shouxin. To the south the Japanese 8th Regiment was stationed in Fengning, for mutual support with the forces in Dolonnur.[2]

The Anti-Japanese Allied Army found its situation worsening day-by-day. On June 1, Japanese airplanes bombed Dushikou, on June 4, Baochang fell to the Japanese, as did Kangbao on June 5. On June 21, Feng Yuxiang ordered the Anti-Japanese Allied Army to launch a counteroffensive in three columns to regain the lost territory. On the June 22 its vanguard approached Kangbao, and after several hours of fighting, the Manchukuo force under General Cui Xingwu fled, allowing the Chinese forces to re-occupy the town.

In late June, a force under Ji Hongchang pushed northeast against Dolonnur with two corps. The Northern corps recaptured Baochang from the now-demoralized Manchukuo force under Cui Xingwu. The Southern corps under Fang Zhenwu advanced on Guyuan, held by the collaborationist General Liu Guitang. Liu was persuaded to change sides, and surrendered Guyuan and other places on the Bashang Plateau without battle.

On July 8, before dawn, Ji Hongchang began an assault on Dolonnur, capturing the two outer defense lines outside the city before being driven back with heavy casualties. Later some of Ji's soldiers were sent in disguise into the city as covert operatives to gather intelligence for a second attack. This second attack re-captured Dolonnur on July 12, effectively driving the Japanese-Manchukuo armies out of Chahar province. In late July, Feng Yuxiang and Ji Hongchang established the "Committee For Recovering the Four Provinces of the Northeast" at Kalgan, directly challenging threatening Japan's hold on the recently established puppet state of Manchukuo.

Chiang Kai-shek believed that communists dominated the Anti-Japanese Allied Army, and felt that it was a threat to his authority.[3] When the Anti-Japanese Allied Army was proclaimed, the Kuomintang military committee in Peking issued an order to cut off passenger train service to Kalgan. Later they sent an armored train close to Kalgan, and directed Yan Xishan to station troops on the Shanxi border with Chahar, including the 42nd Division under Feng Qinzai, Chinese 35th Army under Fu Zuoyi and Chinese 3rd Army under Pang Bingxun. In July the Chinese 17th Army under Xu Tingyao and 87th Division under Wang Jingjiu relieved the forces of Sun Dianying and took control of the Peiking - Suiyuan rail line, preventing outside supply and reinforcement to the Anti-Japanese Allied Army.

Chiang Kai-shek also used the Anti-Japanese Armies internal disunity against it, sending spies in to gather intelligence, create rumors, sow dissension, and buy or win over some of the leaders. Generals Gang Bao, Feng Zhanhai, Li Zhongyi, Tan Zixin eventually defected to Chiang. Deng Wen was assassinated.

Japan seized the opportunity provided by this disunity to invade Chahar again in August. On August 8, the Japanese bombed Guyuan and again attacked Guyuan and Dolonnur. Ji Hongchang temporarily stopped the Japanese forces, but the effects of Chiang's blockade meant that food, clothing, ammunition and money were all in short supply. Feng Yuxiang was not able to bring these in from outside Chahar, and the province itself lacked the resources to support the army.

Feng Yuxiang sent a telegram on August 5, announcing that he was going to officially disband the Anti-Japanese Allied Army and asked the national government to let Song Zheyuan return to oversee the process. Many officers and men in the Anti-Japanese Allied Army, now unpaid, suffering starvation, disease and lacking the means to fight were now easily persuaded to join the Chinese Army or submit to being disbanded. Feng Yuxiang resigned his post on August 18, and left Chahar; Dolonnur was re-captured by the Japanese immediately afterwards.

Song Zheyuan made Ruan Xuanwu (former commander of 5th Corps) Shandu garrison commander, overseeing two regiments and Fu Chun (former commander of 24th Division) commander of another regiment under Ruan's command. Zhang Lingyun (former commander of 6th Corps) became Baochang garrison commander; Mie Yuling (former commander of Guerrilla Division) was his deputy, commanding two regiments. Huang Shouzhong (former commander of 18th Corps) oversaw the two battalions of the provincial guerrilla detachment. Sun Liangcheng (former commander of Herald Corps), Liu Zhendong and guerilla leader Tang Juwu were each given command of regiments. Zhang Lisheng accepted the post of provincial government consultant in return for disbanding the Chahar Self-Defense Army. Tan Zixin, Zhang Renjie, Li Zhongyi were put under the command of the Peiking Branch Military Committee. The units of Yao Jingchuan, Song Kebin, and others were reduced and reorganized.

With the Anti-Japanese Allied Army under Fang Zhenwu and Ji Hongchang considerably reduced by Song's activities, Fang Zhenwu as the new commander-in-chief ordered the army east to Dushikou. Some of the subordinates of Ji Hongchang attempted to move west to Ningxia via Suiyuan. However Fu Zuoyi and Zhang Lingyun pursued and blocked them east of Ertaizi, forcing them east to join Fang Zhenwu at Dushikou.

On September 10, Ji Hongchang went to Yunzhou (north of Chicheng) to meet with Fang Zhenwu, Tang Yulin, and Liu Guitang in a military conference, together they decided to reorganize their troops and changed their name to the 抗日讨贼军 "Resist Japan Thief Punitive Expeditionary Army", Fang Zhenwu was to be commander-in-chief, Tang Yulin deputy commander-in-chief, Liu Guitang Right Route commander, Ji Hongchang Left Route commander. Surrounded by Nationalist forces to the south and Japanese to the north the decision was taken to leave from Dushikou and advance southward toward Peiking.

After the meeting, Ji's Left Route troops pushed southward via the Hei River toward Huairou east of the Great Wall and the Right Route troops under Fang Zhenwu moved west of the Great Wall along the Bai River to the southeast. Both forces crossed the Great Wall on September 20 and on September 21, Ji attacked Huairou and Fang Zhenwu attacked and occupied Miyun on the same day.

Meanwhile, Liu Guitang, after talks with Sung Che-yuan, defected back to the Japanese side again. Liu was given the title of "Bandit Suppression Commander of Eastern Chahar", commanding three regiments stationed at Chicheng,[4] Dushikou and Yunzhou. Liu's force blocked Tang's troops from following the rest of the Anti-Japanese Allied Army south, leaving Fang Zhenwu and Ji Hongchang to continue alone.[5]

On September 25, Fang Zhenwu attacked and occupied Gaoliying. A Japanese reconnaissance aircraft dropped a warning to withdraw from the Tanggu Treaty demilitarized zone the following day, and when he failed to do so on September 27, Japanese aircraft bombed his position. Feng and Ji decided to continue the advance with their remaining 6,000 men, (approximately half unarmed), divided in three groups. At the beginning of October, Ji's forces encountered the forces of Shang Zhen, Guan Linzheng and Pang Bingxun at Changping, blocking their further advance. In a few days they had surrounded the Anti-Japanese Allied Army. Although short of food and ammunition, after several days of heavy fighting Fang and Ji's forces were able to break out to the east at Xiaotangshan but with heavy losses and were again trapped. The remaining 4,500 men were forced to capitulate. Ji was able to slip away during the confusion, going to Tianjin to continue to carry on his opposition to Japan. Fang Zhenwu was forced into exile in Hong Kong.[6]

For some time before the capture of northern Chahar, Japanese secret agents had been operating in Suiyuan, setting up radio stations with operators disguised as Buddhist priests. Following the promotion of General Seishiro Itagaki to Chief of Staff of the Kwantung Army, plans for the establishment of the invasion of Suiyuan went forward.

In late April 1936, Prince Demchugdongrub and Li Shouxin met with the Japanese Special Service Chief Captain Takayoshi Tanaka, at West Wuchumuhsin. Representatives from Inner Mongolia, Qinghai and Outer Mongolia also attended the meeting, which was called the "State-Founding Conference". A plan was made to create a new Mongolian Empire, which would encompass all of Inner and Outer Mongolia and Qinghai province. As a result of this conference, the Mongol Military Government (蒙古軍政府), was formed on May 12, 1936. A mutual assistance agreement with Manchukuo was concluded in July 1936, and Japan agreed to provide both military and economic aid.

Prince Demchugdongrub set out to enlarge and equip his army, increasing from three cavalry divisions to nine divisions with the aid of his Japanese advisors. The Japanese provided arms captured from the Northeastern Army but Tanaka ignored the advice of the Mongolian leaders and also recruited poorly armed levies and ex-bandits from various regions. Having no unity, poor training and poorly armed, this irregular force of around 10,000 men had poor morale and cohesion and proved to be a liability rather than an asset. Additionally a collaborationist Chinese army of questionable loyalty, the Grand Han Righteous Army under Wang Ying was attached to the new Inner Mongolian Army[8]

The Japanese also created a "Mengjiang Air Force" with 28 combat aircraft, with Japanese air and ground crews based in Changpei, to assist the army in close air support. The Japanese also provided artillery pieces and armoured cars, (and also reportedly up to thirty tanks or tankettes), also crewed by Japanese. The South Manchurian Railway Company sent 150 trucks to form a transportation regiment, and Manchukuo government sent communications equipment.

General Fu Zuoyi prepared for the expected Japanese-Inner Mongolian assault by seeking reinforcements for his provincial forces from the governor of Shanxi province Yan Xishan, as well as Chiang Kai-shek, who had moved his Central Army forces into Shaanxi province to attack Chinese Red Army units arriving there after the Long March. On August 9, Yan sent the Chinese 19th Army under Wang Jingguo consisting of the 68th Division, 7th and 8th Independent Brigades and four artillery regiments, and on September 18, the Central Army sent one anti-aircraft artillery battalion.

On October 14, Chiang Kai-shek sent a telegram to Yan Xishan, advising that he was sending Tang Enbo and the Chinese 13th Army (with 2 divisions) and Men Bingyue's 7th Cavalry Division to reinforce Suiyuan. On October 30, Yan Xishan and Fu Zuoyi met with Chiang Kai-shek, to assess the military situation and determine troop dispositions. On November 11, Yan Xishan divided his forces into three Route Armies, a Cavalry Army and a Reserve Army, with troop dispositions to be completed as soon as Tang Enbo's forces arrived. However, the Japanese struck first on November 15, 1936.

The invasion of Suiyuan began on November 14, 1936, when a coalition of the Inner Mongolian Army's 7th and 8th Cavalry Divisions, Wang Ying's Grand Han Righteous Army, and Mongol mercenaries from Rehe, Chahar and other areas, supported by 30 Japanese advisors, attacked the Chinese garrison at Hongort.

After several days of fighting the attackers failed to capture the town. On November 17 a Chinese counterattack surprised the invaders and led to a disorganized retreat. Taking advantage of the Mongolian disorder General Fu Zuoyi made a flanking movement to the west of the Mongolian headquarters at Bailingmiao and attacked, capturing it and routing the Mongolian forces. Wang and his Grand Han Righteous Army were trucked into a location near Pai-ling-miao and launched a counterattack, which failed dismally on December 19, with most of the attackers either taken prisoner or annihilated. [9]