반장
In Pan Zhang's later years, he was tasked with defending Sun Quan's territories from invasions by the state of Cao Wei, which was founded by Cao Cao's son and successor, Cao Pi. In 223, Cao Pi sent Zhang He, Xu Huang, Cao Zhen, Xiahou Shang and others to lead armies to attack Nan Commandery () with the objective of capturing the commandery capital Jiangling County, which was defended by Zhu Ran. Xiahou Shang sent 30,000 troops to build pontoon bridges for crossing over the Yangtze River to Bailizhou (), an island stretching over 100 "li" in the river around that area. Zhuge Jin and Yang Can () wanted to lead their men to defend the island but were unable to locate the Wei troops' crossing points. Pan Zhang told them, "The Wei army's morale is very high at the beginning and the tide is low, so we shouldn't fight them yet." They moved to about 50 "li" upstream, where Pan Zhang ordered his men to collect thousands of bundles of reeds, attach them onto some large rafts, and set them on fire. The flaming rafts were then allowed to sail downstream and they destroyed the enemy's pontoon bridges. Xiahou Shang sensed that he was in danger of being isolated so he withdrew his forces from the island before his retreat route could be sealed. Pan Zhang moved to Lukou (陸口; at Lushui Lake near present-day Chibi, Hubei) and stationed there. Sun Quan praised Pan Zhang for his efforts and promoted him to General of the Right ().