In 236, Grand Commandant
Sima Yi recommended Wang Chang to the second Wei emperor
Cao Rui as a talent. Wang Chang was appointed as the Inspector of
Xu Province and enfeoffed as the Marquis of Wuguan Village (). He was later appointed General Who Attacks the South () and acting supervisor of military affairs in
Jing and
Yu provinces. Wang Chang noticed that his base at Wancheng was too far away from
Xiangyang, an important city on Wei's southern border. Besides, the military camps in that region were quite scattered and their naval force was far away at Xuanchi. If enemy forces from Wei's rival state
Eastern Wu attacked them, their armies would not be able to provide support in time. Hence, Wang Chang changed his base to
Xinye, ordered drills to be conducted for their naval forces, and promoted agriculture to build up food supplies. In 250, during
Cao Fang's reign, the political turmoil in Wu had just ended and the Wu general
Zhu Ju was recently dismissed by
Sun Quan and forced to commit suicide. Wang Chang felt that the time was ripe to attack Wu, so he ordered
Zhou Tai to attack Wu (), Shigui () and Fangling () counties;
Wang Ji to attack Yiling (); while he personally led an attack on Jiangling (). Wang Chang's troops used bamboo splints to build bridges to cross the
Yangtze River and defeated the Wu general
Shi Ji, killing Zhongli Mao () and Xu Min (), returning victorious to Wei with many spoils of war. For his contributions, Wang Chang was promoted to Senior General Who Attacks the South () and promoted from a village marquis to a county marquis under the title "Marquis of Jingling" (). In 252, Wang Chang proposed his plan to attack Wu again. At the same time,
Zhuge Dan,
Hu Zun and
Guanqiu Jian also proposed their respective plans. The Wei regent
Sima Shi accepted their proposals and ordered them to attack Wu from three directions. Wang Chang was assigned to attack
Nan Commandery, but due to Hu Zun and Zhuge Dan's defeat by the Wu general
Zhuge Ke, Wang Chang was forced to retreat. ==Suppressing rebellions==