Night Reapers 2nd Company Assault Marines

The Imperial Guard Captain stood outside his command tent and awaited the arrival of the Astartes. He'd never heard of the Night Reapers Chapter and if he was honest had been hoping for one of the chapters of legend such as the Ultramarines or Dark Angels...of course any Astartes support was to be gratefully received as he couldn't afford to lose any more men in yet another futile assault on the bunkers guarding the pass. He had no armour to speak of and no air support at all so his options for the assault had been limited to massed infantry assault which (as he had attempted to inform high command in as tactfully a way as possible) was doomed to failure.

He had unfortunately been correct in his assessment....anti-infantry fire from the armoured positions had cut his men down long before they reached a position from which they could do any damage and despite his (subtly worded) protestations a second assault had been ordered. The transmission from the Astartes offering their assistance was unexpected but extremely well timed...

Four Razorback transports with dual Assault Cannons mounted on their backs idled their engines while the four squads of Assault Marines stood around them readying their weapons and the distinctive sound of Chainswords being activated drifted towards the Guard Captain and his Command Squad. The commander of the Marines was an imposing figure in metallic blue armour shrouded in a cloak of dark grey material with a strange helm with spiral marked horns completing his rather unorthodox appearance. An unwieldy looking axe that occasionally glowed with a cold blue/green light was connected into his armour by a thick length of power cable and a arcane looking combi-weapon was held casually in his other hand.

"We will assault immediately after our basic preparations are complete" "we'll vox you when the path is clear"

With that brief situational assessment complete the Librarian turned and walked over to his men and their transports.

The guard commander stood in the middle of his enemies command centre and surveyed the scene of devastation. Body parts littered the floor and smears of blood coated the walls of what had once evidently been the enemy commanders office from the look of the papers, maps and other miscellaneous items that had survived the Astartes purging of the area...

The defenders had been unprepared for the speed at which the transports had navigated the pass and the weight of fire from the Razorbacks Assault Cannons had forced them back into their bunkers and had reduced their suppressing fire to next to nothing. The disembarking Marines quickly breached the armoured doors with Melta weaponry, before entering the facility and butchering those inside who had stupidly attempted to resist their entry.

...one of the Marine unit leaders entered the office. He was cloaked like his superior but lacked the ornate headgear and weaponry that he possessed...

"The area is secure..." he stated somewhat obviously "you may proceed with your mission" and as quickly as they arrived they were gone...