曹洪
In 197, Cao Cao lost the Battle of Wancheng against a rival warlord Zhang Xiu and retreated to Wuyin County (舞陰縣; southeast of present-day Sheqi County, Henan). After Cao Cao left Wuyin County and returned to Xu (許; present-day Xuchang, Henan), the officials in Nanyang (南陽), Zhangling (章陵) and other counties who had surrendered to him earlier rebelled and defected to Zhang Xiu's side. Cao Cao sent Cao Hong to lead troops to recapture those counties but Cao Hong failed and was forced to retreat to a garrison at Ye County (葉縣; southwest of present-day Ye County, Henan). The garrison came under multiple attacks by Zhang Xiu and his ally Liu Biao.