Bayan of the Baarin (Mongolian: Баян; 1236 – January 11, 1295), or Boyan (Chinese: 伯顔; pinyin: Bóyán) was an ethnic Mongol general of the Yuan dynasty of China.
After the success of the Battle of Xiangyang in 1273, Kublai appointed Bayan as the commander of the Yuan army[4] and general Aju agreed the decision.
The Song regent and Grand Empress Dowager Xie had no choice but to rely on Jia Sidao for fighting the Mongols.
More Song generals surrendered, including Fan Wenhu in Sichuan and Chen Yi in Huangzhou (Huanggang area, Hubei).
Hearing that Liu Zheng had died, Jia Sidao experienced a brief ecstasy and led an army of about 130,000 against the Mongols, but he suffered defeat on the Yangtze River.
The populace of the Jiangsu areas, around the Yangtze, including Zhenjiang and Jiangyin, deserted their homes in the face of the Mongol attacks.
At this point Zhang Shijie of E'zhou (Hubei Province), Wen Tianxiang of Jiangxi and Li Fei of Hunan came to the east to help the Song court.
Then the Mongols stopped peace talks and attacked Yangzhou on the northern bank of the Yangtze (Changjiang River) and defeated two generals under Li Tingzhi.
Wen Tianxiang arrived in Lin'an (Hangzhou, the Song capital), but the Empress Dowager did not take his advice.
Wen Tianxiang and Zhang Shijie advised that the Song court relocate to the islands ioffshore, but Prime Minister Chen Yizhong decided to send the imperial seal to the Mongols in token of surrender.
The Song appointed Wen Tianxiang as the rightside prime minister and ordered him to go to the Mongols to seek peace.
Persian minister Ahmad Fanakati was jealous with Bayan's success and tried to calumniate him that he plundered Chinese commoners.
Following year, Shiregi defected to Kaidu's side and arrested the prince and An-tong due to another relative Tokhtemur's conviction.
Kublai then ordered prime minister Bayan to counter Kaidu, who had started to close in on Karakorum and rebel princes.
Rashi ad-Din wrote that Tode Mongke released Nomukhan and expressed his willingness to submit to Kublai after his sons' 10 years hostage in Crimea.
[7] Kublai recalled Bayan when Nai-yan (or Nayan, the great-grandson of the brother of Genghis Khan) reportedly planned rebellion in the areas between the Onon and Kerulen rivers of Mongolia.
Ta-chu defeated the Nai-yan remnants under Khadan (Descendant of Genghis Khan's another brother) and chased them westward to the Altai.
Bayan received orders to counter Kaidu, who harassed Helin in the west; and Prince Temür (grandson of Kublai) had the duty of guarding the Liao River area in the east.