Pān Zhāng appellation Wénguī was a Dōng-jùn Fāgān man. When Sūn Quán was Chief of Yángxiàn , he first went to follow Quán. By nature was unrestrained and wasteful and addicted to alcohol. He was poor, and liked to borrow money to by alcohol. When creditors came to his gates, he said to them that later he would become rich and powerful and then repay them.
Quán thought he was exceptional and favored him, and so sent him to levy recruits. He obtained over a hundred men, and then became their commander, attacked mountain bandits with achievements, and became a Separate Command Major. Later he served in the Wú main market killing criminals, so criminals were eradicated, and from this he gained reputation, and was promoted to Chief of Xī’ān in Yùzhāng. From when Liú Biǎo occupied Jīngzhōu, the people were repeatedly robbed, but from when Zhāng was appointed, robbers could not enter the borders. The neighboring county Jiànchāng had uprisings of bandits and rebellion, so he was transferred to Jiànchāng, also appointed Colonel of Martial Fierceness, attacked and suppressed the evil peoples, and in a moon all was pacified. He gathered the remaining scattered forces, obtaining eight hundred men, and led them back to Jiànyè.
In the Héféi campaign , Zhāng Liáo suddenly arrived, and all the officers were unprepared. Chén Wǔ died in battle. Sòng Qiān and Xú Shèng were defeated and fled. Zhāng was located at the rear, galloped forward, and from his horse beheaded two men among Qiān’s and Shèng’s fleeing troops, and the troops all returned to battle. Quán was deeply impressed by this, and appointed him Assistant-General, and so he commanded a hundred regiments and camped on an islet halfway [across the Jiāng].
When Quán attacked Guān Yǔ , Zhāng and Zhū Rán cut off Yǔ’s escape route, arrived at Línjǔ, and halted at Jiāshí. Zhāng’s subordinate Major Mǎ Zhōng captured Yǔ with Yǔ’s son Píng, Commander Zhào Léi, and others. Quán then divided from Yídū Wū and Zǐguī two counties to form Gùlíng commandery, and appointed Zhāng its Administrator, General Rousing Authority, with fief as Marquis of Lìyáng. Gān Níng died, and he took over his army.
Liú Bèi went out against Yílíng , Zhāng and Lù Xùn joined forces to resist him, and Zhāng’s subordinates beheaded Bèi’s Protector of the Army Féng Xí and others, and the killed and injured were very many. He was appointed General Pacifying the North and Administrator of Xiāngyáng.
Wèi General Xiàhóu Shàng and others besieged Nán-jùn, and sent at the front thirty thousand men to build pontoon bridges, and crossed a hundred lǐ to an islet. Zhūgě Jǐn and Yáng Càn both gathered their troops to rescue it, but did not know where to set out, and the Wèi troops were daily crossing without end. Zhāng said: “The Wèi army’s strength is flourishing, and the river’s water is shallow, so we cannot yet do battle.” He therefore led those he commanded, and arrived fifty lǐ upstream from the Wèi army, cut down several millions of reeds, bound them into large rafts, and wished to send them downstream to set a fire, and burn their pontoon bridges. The construction of the rafts was complete, and they waited for the water levels to rise to send them down, and so [Xiàhóu] Shàng retreated. Zhāng went downstream to defend Lùkǒu.
When Quán took Imperial title  he was appointed General of the Right.
Zhāng as a man was crude and violent, his prohibitions were severe, he liked to brag of his achievements, and though the troops and horses he commanded did not exceed several thousand, he always acted as if it were ten thousand men. When he stopped on campaign, he would establish a military supply market, and the other armies if they lacked something all depended on him. But by nature he was extravagant, and in his final years became even more so, and his clothes and objects usurped higher ranks. The wealthy among his officials and troops he would sometimes kill and take their property. He repeatedly did not obey the law. Supervisors and officials sent up memorials of this, but Quán appreciated his achievements and always forgave and made no investigations.
Jiāhé third year  he died. His son Píng due to improper behavior was exiled to Kuàijī. Zhāng’s wife resided at Jiànyè, was bestowed with farmland and residences, with retainers of fifty families.