I'm gonna nitpick some random sentences from this. This writing isn't bad, but the prose is kind of awkward, so I'm hoping I can try and help you with it.
Bloodfrenzy wrote:The vox static hissed like the hot fat sizzling upon some cooks skillet in the ear piece of Captain Hargrave Nehilen of the 3rd company.
This sentence is too long and awkward. I'd shorten it to something like, "The vox static hissed like sizzling fat in Captain Nehilen's earpiece."
Bloodfrenzy wrote:The buildings of this mysterious city his company moved through were almost all dilapidated as if some major battle of a great war was fought here recently but if that was so then where were the combatants bodies, discarded weapons and such?
This sentence is also too long and awkward. I'd cut it up like this; "Nehilen led his company through the ruins of a great city. Rust clung to every steel surface, and rank brown vines wormed their way up walls of crumbling masonry. Blackened craters in the sides of buildings and bullet holes punched through walls were an all too common sight. Entire buildings had been reduced to mountains of charcoal grey rubble. It was obvious that there had been a battle, and a great one too. Despite this, there weren't any bodies, discarded weapons, or even spent bolter shells. There weren't even footprints."
Bloodfrenzy wrote:He rose and holstered his pistol then walked towards the nearest building which looked as if it had been spared the worst of whatever cataclysmic events happened here.
"He rose from his crouching position, holstering his pistol. Amid the wreckage of the city, one building stood out. It was mostly intact, having been spared the worst of whatever happened in this throne-forsaken place."
I would suggest going back through your work and reading the whole thing out loud.