What you are asking about is probably the city of Jingzhou. This city was called Jiangling City during the Three Kingdoms, and was the seat of Jingzhou, which is now the city of Jingzhou in Hubei Province. During Liu Biao's time, Jiangling was the place where Jingzhou's supplies were stocked, and it was quite an important geographic location in its own right, so it was a place where soldiers had to fight. When Cao Cao came south to Jingzhou, Liu Bei was unsuccessful in his defeat and Jiangling was occupied by Cao Cao. After the Battle of Red Cliff, Cao Cao returned to the north, but Jiangling was still occupied by Cao Ren, a Cao general. Zhou Yu of Eastern Wu besieged Jiangling for a year and finally took it. Soon after, Liu Bei proposed to Sun Quan to "borrow Jingzhou", and Sun Quan delivered the city of Jiangling to Liu Bei. After Liu Bei entered Sichuan, Guan Yu guarded Jingzhou, with his seat in Jiangling. After Guan Yu's defeat, Jiangling returned to the hands of Eastern Wu. So far, the "property right" of Jiangling has not changed.