Stuck in Warhammer 40k(isekai)

unexpected allies of 'Orion'

POV 'Orion'

The first thing I see is a power fist of a kastelan staring right down on me... in the door tehri was a kastelan armed with two kastelan fists and mounted on his shoulder stood a heavy flammer. Once he Saw fives he relented and moved to the side.

"Threat not detected, allies may enter" the kastelan robot says.

Soon the odd group entered the door to find itself in a living complex, inside there were many civilians, roughly 200. The hubs were organised in apartment-like buildings, with rampart leading to the more upper side, to the left side of the chamber which to guess was at least a few kilometres high and wide, was an algae farm, most likely to feed the population.

"Children of the Omnissiah! Your aid is here!!" Theta says out of his metallic(?) lungs and soon the population moves to see the stranger, but instead of talking with the techpriest, they go to me. Which Theta process to grunt in annoyance.

"Lord Astartes you came to save us and-" one of the civilians says, he looks more elderly than the other with more gaunt features, he has white hair and like all others is wearing industrial worker attire.

"Civilian... I wish I could give you more aid, but for now this is all that I have under my command." I say as I gesture to the rest of the group which conditions were not optimal.

"Oh..." he says in disappointment.

"But worry not civilian, for I am here. We are gonna restart the production lines and bring the fight to the enemy!!!!" I say and this time many of the other civilians also Raised their voices, most likely the idea of fighting beside one of the emperor's own angles of death.

POV changes to 3d person and timeskip of 2 days.

Since the arrival of the odd grupe more information reached Orion on the current situation. This planet is called Tematur VI, it is a hive world with 12 major hives, 3 of which are gone, destroyed by the genestealer onslaught. The rest of the hives are under attack, hive Selucia,the one Orion is in, is the newest and smallest hive. Thus the attack was smaller compared to the others, but nevertheless it was devastating. All signal was lost to the other hives, but due to the fact they were still alive it is proof that the others are still holding.

Since then it has been done to try to repair the manufactorum, but it was more bigger than expected by Orion, thus his forces only occupy a very small area, thus a perimeter was made of 1 kilometre around the area in a square shape. Since then the loyalist got only 2 areas up and running and had to put 50 of the civilians working there, for what? Lasguns and cadian pattern armour. The original purpose of this area was for production of vehicles, but with the help of Theta it was put to this new purpose but not without reservation...

"I will not tamper with the designs, this is heresy!!!!" Theta screams at Orion with ignidation.

"Theta, it is necessary evil, but we need more guns for the upcoming battles, a vehicle in here will not help due to not having any promethium. IF we do not do anything the forge will fall to xeno hands." Orion says putting emphasis on the last part;

This caused the tech priest to understand and continue on his work, somehow he seems to find a working plasma reactor to power up the production line, as it seems the manufactorum had its own.

"You are telling me you techi boys had a plasma reactor and did not tell us?!" Says Jael with indignation

"Well yes but-" Before theta could respond the rest of the guardsmen were restraining Jael so he would not kill the techpriest...

The only issue we are gonna run into is getting the material necessary for construction. Even with the production line running, it is not smooth due to holes on the ground and other hazards around due to the battle.