After Cao Cao unified northern China in 207, he made arrangements for a southern campaign on Jing Province (荊州; covering present-day Hubei and Hunan), governed by Liu Biao at the time. Initial minor invasions led by Xiahou Dun were repelled by Liu Biao's vassal Liu Bei, whose forces were stationed at Xinye at the northern border of Jing Province. Following that, Cao Cao personally led his armies south to attack Jing province in the seventh lunar month of 208.