Cao Hong
Around 190, the warlord Cao Cao, an older second cousin of Cao Hong, raised an army to participate in the campaign against the tyrannical warlord Dong Zhuo, who controlled the Han central government. Cao Hong joined Cao Cao around this time and served as an officer in his army. Cao Cao engaged Dong Zhuo's general Xu Rong at the Battle of Xingyang, but was defeated and forced to retreat. While fleeing from the enemy, Cao Cao lost his horse so Cao Hong got off his own horse and offered it to him. When Cao Cao declined, Cao Hong said, "The world can do without (Cao) Hong, but it can't do without you." He then escorted Cao Cao on foot to the bank of the Bian River. As the river was too deep for them to wade across, Cao Hong swam around in search of a boat and finally found one. They crossed the river and returned to Cao Cao's hometown in Qiao County (譙縣; present-day Bozhou, Anhui) safely.