The intense explosions caused the ground and mountain walls to tremble, as countless rocks and dust rained down from the sky, creating a crackling sound.
"Enemy attack! Enemy attack!"
"Watch out above!"
"Take cover immediately!"
"Initiate Plan B-4, deploy the 'Folding Barrier' now!"
The officers of the Imperial Army responded swiftly, blowing sharp whistles and shouting loudly.
The pattern of the whistle—three long and one short, then two short and one long—seemed to contain some sort of code.
The troops didn't panic under the sudden bombardment, thanks to their regular training and strong obedience. They quickly sprang into action upon the orders and whistles from their commanders.
Except for a few extremely unlucky soldiers who were directly hit by the bombs falling from the sky, pulverized into fragments, the remaining soldiers worked in groups, pulling out palm-sized metal cubes from their backpacks, activating them and tossing them onto the ground.
