In the evening, the Pyro Company's 3rd Division base was completely quiet. Everyone had already eaten dinner in the afternoon as they made a last-minute change to their meal plans. This was a sign that they were preparing to launch a surprise attack.
The artillery troops were already on standby atop the walls. This time, it would be an infantry brigade that would advance into the northern forest. What the artillery troops needed to do was to provide cover for the infantry brigade during their retreat.
The Pyro Company troops did not choose to set off at night because there were spotlights installed on the Great Wall. With all the lights switched on at night, their troops would be exposed to the barbarians.
But if they deliberately switched off the spotlights, it would also attract the barbarians' attention. After all, they had been switching them on punctually every day. If the lights were not switched on today, it would be obvious that something was off.