239 Never Fight In A Basement

With their gas masks on and the rebreathers active, the Infantry forces slowly advanced their way through the smaller tunnels of the mountain complex.

Made of limestone, and naturally formed over thousands of years of runoff, these caverns were an amazing testament to the natural powers of running water. Or at least they were before the Klem arrived. 

The monstrous insects' presence was everywhere here, and unmistakable, as their sharp legs made distinct patterns in the soft stone, and they carved away large portions of the existing tunnel walls to make way for themselves, not worried or not understanding that their cleared path only made it easier for the humans to follow them.

"Pan right, I see claw marks headed up the wall." Lieutenant Calda barked at his squad.