Dynasty Warriors 5:XL - Legend of Zhang Liao 5 - Battle of He Fei

This is pretty fitting for Zhang Liao's final stage. Since you're playing AS Zhang Liao you don't get teleported in front of Sun Quan and start fighting him as part of an ambush. To compensate for this, performing feats such as gaining KOs will cause the Wu army to go from being in awe to being terrified of Zhang Liao, lowering morale several times which makes it easier to keep all your allies alive.
Gan Ning appears shortly after Cao Cao does and serves as the boss here, if you choose to circle back to defeat him rather than finish off Sun Quan as fast as possible.