After the Qian army's vanguard collapsed, their eastern flank, which had remained stable despite constantly wavering, completely shattered. Then, the western flank, which had been quite stable and hadn't faced much pressure, also collapsed.
People possess a herd mentality. On the battlefield, when individuals are extremely agitated and tense, it becomes difficult for them to maintain clear thinking. They are left with only one instinct: to follow the crowd. The thought process becomes: Others are running? Then what should I do? I should run too! A chain reaction had formed; those who didn't want to run were swept up by the fleeing masses. The Qian army had collapsed entirely!
In fact, from the start of the battle to this point, the Qian army had only suffered a few thousand casualties, yet this had triggered a complete breakdown of their thirty-thousand-strong army.
Once the infantry formations crumbled, they were essentially a flock of lambs to the slaughter.
