and made him his prime minister. Later, when Emperor Ming faced Wang Dun's forces in 324, Wang Dao contributed greatly to defeating Wang Dun's force by falsely claiming that Wang Dun was dead—a claim that the army believed because he was Wang Dun's cousin and which gave the army high morale. Before Emperor Ming's death in 325, he made Wang Dao one of the officials he entrusted his four-year-old son Sima Yan with. During Emperor Cheng's reign After Sima Yan took the throne (as Emperor Cheng), several officials who were named in Emperor Ming's will were put in charge—that included Wang Dao, Sima Yang (司馬羕) the Prince of Xiyang, Bian Kun (卞壼), Chi Jian, Yu Liang, Lu Ye (陸瞱), and Wen Jiao. However, quickly, Yu Liang, as the brother of Emperor Cheng's mother Empress Dowager Yu, became effectively the most powerful among them, as Empress Dowager Yu became regent. Wang's role in government continued to be important, however. In 327, the ambitious general Su Jun, offended by Yu Liang's attempt to strip him of his military command, rebelled along with Zu Yue, and Su's forces quickly captured Jiankang in early 328, taking Empress Dowager Yu and Emperor Cheng hostage and forcing Yu to flee. Wang, who remained in Jiankang, continued to be respected by Su, but secretly ordered the provincial forces to resist Su. As Tao Kan and Wen gathered their forces and marched against Su's, Wang persuaded Su's general Lu Yong (路永) to defect to Tao and Wen, and Wang and Lu fled Jiankang together, joining Tao and Wen's forces. Later that year, Su was killed in battle, and in early 329, his remaining forces were defeated. As Empress Dowager Yu died during Su's rebellion, most officials requested Wen stay in Jiankang to serve as regent, but Wen, believing that Emperor Ming intended for Wang to be regent, declined and gave the post to Wang. For the next few years, Wang was largely in control of the government, but Yu Liang, who had then exiled himself from the capital as the governor of Jing Province (荊州, modern Hubei and Hunan), continued to be influential despite his distance from the capital. In 338, Yu, unhappy that, in his view, Wang was not adequately preparing Emperor Cheng to rule, tried to persuade Chi Jian to jointly act with him to depose Wang, but Chi refused. Wang stayed regent until his death