After Liu Bei became King of Hanzhong, Guan Yu attacked Cao Ren at Fan. Autumn rain swelled the Han. Yu Jin’s seven armies drowned. Yu Jin surrendered. Pang De was killed. Cao Cao even discussed moving the capital. This is the height of Guan Yu’s career, in his biography.
At the same time Lü Meng crossed the river and took Jiangling and Gong’an. Guan Yu could not get back, fell toward Maicheng, and was killed. The victory in the north did not make Jing safe. The campaign has to be read as a front and a rear together.