Complex sentence: When Cao Cao pressed on Ruxu fort, Sun sent out Ling Tong, Xu Sheng and the likes to do battle, during the ensuing engagement, Sun Guan was killed in action, and Cao Cao temporarily waived the attack.
Split into simpler sentences: When Cao Cao pressed on Ruxu fort, Sun sent out Ling Tong, Xu Sheng and the likes to do battle. During the ensuing engagement, Sun Guan was killed in action, and Cao Cao temporarily waived the attack.