In the Romance of the Three Kingdoms, the Red Hare was one of Guan Yu's most important weapons and one of the reasons why he killed Yan Liang. But whether or not he could kill Yan Liang depended entirely on Guan Yu's own ability and battle strategy. The duel between Guan Yu and Yan Liang happened after the Battle of Red Cliff. At that time, Guan Yu had already obtained the Red Hare Horse and the Green Dragon Crescent Blade. Although the Red Hare was very important to Guan Yu, it wasn't the only reason he killed Yan Liang. Although Yan Liang is skilled in martial arts, he also has some flaws. For example, his weapon is not good and he is easily hit by Guan Yu's attacks. Guan Yu used a very wise strategy in the battle. He used the terrain and Yan Liang's negligence to launch a surprise attack and finally killed Yan Liang. Therefore, even without the Red Hare, Guan Yu could still rely on his martial arts and battle strategy to successfully kill Yan Liang.