The artillery bombardment never ceased from the beginning to the end of the war, with the Aud Army almost constantly under fire.
Yet, despite the intensity of Lipei's defensive artillery fire, the casualties inflicted on the Aud Army began to significantly decrease.
On the fifth day of combat, Aud Army casualties suddenly plummeted from more than two thousand to just over three hundred.
The direct reason for this was the Aud Army's discovery of a method to cope with the artillery strikes.
They identified a series of connected hilly terrains and began digging fortifications on the reverse slopes.
Tens of thousands of soldiers frantically dug under the cover of night, connecting dots into lines, lines into faces, ultimately excavating over ten kilometers of trenches within three days, constantly deepening and improving them to form semi-permanent fortifications.
