Meng Chenglin's assembled main force of five hundred thousand was considered the cream of the Wei army.
When he led this elite force to launch a surprise attack on Blackwater City, they clashed with the Heturulo army below, and instantly gained a tremendous advantage.
The elite main force of the Heturulo army was simply no match for the Wei army in head-to-head combat.
Not to mention that their main force was only about three hundred thousand strong.
Whereas the Wei army had a full five hundred thousand men.
One side was more elite and numerous, and the other had lower combat power and fewer people, leaving no suspense as to who would win or lose when the two sides clashed.
Under the fierce assault of the Wei army, the Heturulo army suffered successive defeats, losing a hundred thousand soldiers and proving to be no match.
What about the Wei army then?
Although they won battle after battle and conquered numerous enemies, they too were having a tough time.