In 210, Sun Quan declared himself emperor. He first aimed his forces at Cao Cao, hoping he could use the momentum from Red Cliffs to defeat his foe. However, the Wei forces defeated the Wu army over and over again. In 216, Sun Quan formed an alliance with Cao Cao. They planned to assassinate Liu Bei, but the attack failed and Liu Bei declared war on Wu. | In 210, Sun Quan declared himself emperor. He first aimed his forces at Cao Cao, hoping he could use the momentum from Red Cliffs to defeat his foe. However, the Wei forces defeated the Wu army over and over again. In 216, Sun Quan formed an alliance with Cao Cao. They planned to assassinate Liu Bei, but the attack failed and Liu Bei declared war on Wu. |