The sound of artillery shelling the area continued all night, and then just after dawn, the sound of Frost Giant war horns blared across the north end of the valley, interrupting breakfast and causing the radio communications to go crazy.
Karl had left his earpiece out so that everyone could hear the radio during the night, in case the Frost Giants attacked early, but from the sound of the broadcasts, their reinforcements were just arriving.
The bunkers had greatly reduced their casualties last night, and with the addition of hundreds more warriors, the Frost Giants were preparing a charge on the south end of the valley, which would put them in position to flank the main army lines.
The problem for Karl and his team was that the shelling continued, so they couldn't safely approach the Giants to get to work.