The Alliance on the bridge was already ready. After hearing Chen Zhao's order, they immediately gathered and charged at the tribe's camp on the other side of the bridge in the order Chen Zhao had given them!
Because of the fire in their homes, many high-level hunters and mages in the front line rushed back home. The strength of both sides in the front line was gradually tilting in the Alliance's favor. The Horde had been on the offensive all this time, and the last wave of suicide attacks by the Alliance had been quickly extinguished by them. Thus, most of the Horde were still in a very lazy state. They were not ready for battle at all, and they were unable to build a defensive line on the bridge at the first moment.
There were no frost traps, no flares, and not many mages reacted in time to cast blizzards.