Yang Shihou () (died April 23, 915), formally the Prince of Ye (), was a major general of the Chinese Five Dynasties and Ten Kingdoms period state Later Liang, serving as the main obstacle to the expansion of Later Liang's archenemy Jin during latter parts of the reign of Emperor Taizu (Zhu Quanzhong) and the early parts of the reign of Emperor Taizu's son Zhu Zhen.
During Tang Dynasty
Background
It is not known when Yang Shihou was born, but it is known that he was from Jingou (斤溝, in modern Fuyang, Anhui). In his youth, he served as a soldier under Li Hanzhi, who was then the military governor (Jiedushi) of Heyang Circuit (河陽, headquartered in modern Jiaozuo, Henan). After Li Hanzhi lost his own territory and became a subordinate of Li Keyong the military governor of Hedong Circuit (河東, headquartered in modern Taiyuan, Shanxi) in 888, Li Hanzhi gave, as a tribute to Li Keyong, about 100 elite soldiers, and Yang was one of the soldiers thus sent to join the Hedong army. However, Yang did not distinguish himself while serving under Li Keyong. Later, after he was accused of crimes, he fled to Li Keyong's archenemy Zhu Quanzhong the military governor of Xuanwu Circuit (宣武, headquartered in modern Kaifeng, Henan). Zhu made him an officer in the Xuanwu army and the prefect of Cao Prefecture (曹州, in modern Heze, Shandong).
Service under Zhu Quanzhong
The first campaign that Yang Shihou was recorded to have clearly participated in was against Zhu Quanzhong's erstwhile vassal Wang Shifan the military governor of Pinglu Circuit (平盧, headquartered in modern Weifang, Shandong), who rose against Zhu in 903 and subsequently received aid from Yang Xingmi the military governor of Huainan Circuit (淮南, headquartered in modern Yangzhou, Jiangsu) in the form of an army commanded by the general Wang Maozhang. Subsequently, though, Wang Maozhang realized that the Huainan/Pinglu joint army was badly outnumbered by the main Xuanwu army, commanded by Zhu himself, and therefore retreated with the Huainan army. Zhu sent Yang Shihou to give chase, and while Yang was able to defeat and kill Wang Maozhang's rearguard commander Li Qianyu (), Wang Maozhang's main strength was able to withdraw. Subsequently, Zhu left Yang in charge of sieging Pinglu's capital Qing Prefecture while he himself returned to Xuanwu's capital Daliang. Yang pitched his camp at Linqu (臨朐, in modern Weifang) while claiming that he was heading for Mi Prefecture and leaving the supplies at Linqu; when Wang Shifan, believing that Yang had left for Mi, attacked, he fell into Yang's trap and suffered heavy casualties, with his brother Wang Shike () captured by Yang; when the army from Pinglu's Lai Prefecture, Yang also defeated them and almost completely slaughtered them, and thereafter maintained a chokehold on Qing Prefecture. Wang Shifan thereafter sent an emissary to offer to surrender to Yang, and Zhu accepted the surrender. For this victory, Yang was made the military governor of Wuning Circuit (武寧, headquartered in modern Xuzhou, Jiangsu).
In 905, Zhu, displeased that Zhao Kuangning the military governor of Zhongyi Circuit (忠義, headquartered in modern Xiangyang, Hubei) was in close communications with two of his enemies — Yang Xingmi and Wang Jian the military governor of Xichuan Circuit (西川, headquartered in modern Chengdu, Sichuan) — sent Yang Shihou to attack Zhongyi, with Zhu himself commanding the follow-up troops. Yang Shihou quickly captured seven of Zhongyi's prefectures — Tang (唐州, in modern Zhumadian, Henan), Deng (鄧州, in modern Nanyang, Henan), Fu (復州, in modern Tianmen, Hubei), Ying (郢州, in modern Jingmen, Hubei), Sui (隨州, in modern Suizhou, Hubei), Jun (均州, in modern Shiyan, Hubei), and Fang (房州, also in modern Shiyan) — and then rendezvoused with Zhu just north of the Han River. Under Zhu's orders, Yang built floating bridges across the Han, allowing Zhu's army to cross. When Zhao's army put up a defense on the southern bank of the Han River, Yang defeated him and advanced to his capital Xiang Prefecture (). Zhao thereafter abandoned Xiang Prefecture and fled to Huainan. Zhu commissioned Yang as the acting military governor of Shannan East Circuit (山南東道, i.e., Zhongyi, reverting to an older name) and ordered him to attack Jingnan Circuit (荊南, headquartered in modern Jingzhou, Hubei), ruled by Zhao's brother Zhao Kuangming. Zhao Kuangming, hearing of Zhao Kuangning's defeat, fled to Xichuan, and Zhao Kuangming's officer Wang Jianwu () surrendered to Yang. Zhu made He Gui the acting military governor of Jingnan and Yang the full military governor of Shannan East.