"Emperor's mercy, we're safe!! We're safe!!!"
Anxiously tucked on one of the Militia Barracks outpost, the remaining PDF forces assigned to defend the military installation were warily awaiting their fate from the tide of onslaught wrecking Oakwood State. From afar, shadows were lurking on the perimeters of the premise, promising swift death from what seemed to be sniper rifles aimed at the heart of the barracks itself.
Pinned inside their makeshift haven, the PDF conscripts were holding their breath from the impending doom when giant men in deep jade power armours charged from the flanks and stalled the advance of the unseen enemy. The Adeptus Astartes! Now, fate has shifted on their favor as one by one the phantom rebels succumbed to the might of the Emperor's Angels of Death.
With renewed vigor and profound awe upon actually seeing the Space Marines in battle, one of the grizzled military veterans rallied his squad to arms. "Prepare for battle, soldiers! Aid has come from the Emperor and aid shall come unto Him! Let not the heretics walk His lands!!!"
The conscripts shouted the Oakwood Planetary Defense Force battlecry in unison as the first platoon charged out of the outpost towards the bloody skirmish ahead. Then the rest followed, their lasguns trained at the enemy forces. Halfway to the raging melee, the leading platoon abruptly halted their sprint, shoulders sagging from some indefinite reason.
The same veteran who rallied the squad out of the outpost sprinted from behind the lines. "What do you think you are doing, cowards?! Charge! Charge! Cha..." he paused as he got near the front line, squinting at the battlefield. "They're not rebels..." he added, his jaw almost dropped from the grim comprehension. The Space Marines contingent were viciously attacking men in jet black uniforms and Imperial-issue cameleoline veils... familiar battledress from the anals of the Imperial Guards that he had religiously studied.
One of the younger soldiers from behind him mustered to voice out, "Sir, they sure din't look like the defectors from Fespal Third."
"Is not..." the grizzled veteran barely mumbled, still staring incredulously at the battlefield. "They're Tanith First."