This is a story from Three Kingdoms.
Cao Cao appointed Yu Jin as the chief commander of the southern expedition, with Pang De leading the vanguard. They led seven armies to rescue Fancheng City. Upon learning this, Guan Yu of Shu led his forces to confront them.
Guan Yu and Pang De fought over a hundred rounds, with neither gaining an advantage. The duel resumed the next day. After another fifty rounds, Pang De feigned retreat and fled. As Guan Yu pursued, Pang De shot an arrow, wounding Guan Yu, who returned to camp to recuperate.
Ten days later, Guan Yu's wound had healed. He learned from his son, Guan Ping, that Cao Cao's armies had encamped north of the city. Surveying the terrain from a hilltop, Guan Yu observed the enemy camped in a northern valley and noted the unusually swift flow of the Xiang River. He conceived a plan to flood the enemy armies.
Guan Yu ordered his men to prepare boats and rain gear and to dam the river at several points. That same day, Pang De discussed with his officers the need to move to higher ground the next day.
That night, a fierce storm arose. In his tent, Pang De heard the restless horses and distant war drums. Alarmed, he went outside to see floodwaters rushing in from all sides. The seven armies were thrown into panic, suffering heavy losses as the water rose over three meters deep. Yu Jin and Pang De led their soldiers to higher ground.
Guan Yu urged his forces to attack. With no escape, the armies of Yu Jin and Pang De surrendered. Pang De, who had seized a boat in an attempt to flee westward, was intercepted by Zhou Cang's raft and captured alive.