Not a chapter but an explanation for a few things before the story starts.
Firstly, the Force (in star wars) = the warp (in 40k)
Yes I know that the warp is the psychological manifestation of people's emotions and beliefs. I also know that there are chaos gods or chaos entity in the warp but in star wars there are also force entities.
Let's say that the bright side and the dark side of the force are warp gods that doesn't have a consciousness yet, they have rudimentary leanings but doesn't have a clear definitive voice that could be heard or understood.
It's understandable after all they still hasn't developed a full consciousness yet as not all universes is as fucked up as 40K filled with extreme emotions to nurture and grow the chaos gods.
I would say that the state of the warp in Star Wars is similar to the state of the warp in warhammer during the time of the Old Ones.
During the time of the Old Ones the warp was was quite peaceful actually and it is not until the chaos gods got awareness with all the shit happening in the material universe that the warp start being a hell hole.
Now star wars is a "peaceful" place. Well "peaceful" compared to the Warhammer universe. Even the shittiest place in the star wars galaxy can even considered a peaceful heaven in the warhammer Galaxy.
Take the your average day in a hive city for example, and no I'm not talking about the top 1%. I'm talking about more specifically the middle and underhive. No job in star wars is as bad as being a hive worker in 40k and no place in star wars is as shitty as living in 40k's underhive. And to put the final nail in the coffin hive cities are actually pretty common in 40k, infact it's pretty much a standard in any civilised human settlements.
On to the next topic, warp travel in Star Wars galaxy is pretty safe with the lack of demonic warp entities with the lack of extreme suffering and is faster than warp travel in 40k, reason being that warp is the manifestation of extreme emotion so with the lack of said extreme emotion then travel in the warp is faster and easier.
Another analogy is like the difference between going through a storm and going through calm seas. It doesn't take a genius to figure out travelling in calm waters is easier and quicker then in rough waters.
Next topic I want to address is that humans in Star Wars galaxy.
Now in Star Wars legends it's said that humans in Star Wars actually came from Earth in the 25th century during an AI rebellion.
I'll make a few changes and let's say that we change the century to millennium making it the 250th century or using the dating system of 40k M25, during the dark age of technology in imperial lore, during the Cybernetic Revolts to be exact.
For those that didn't know the Cybernectic Revolt is the event long in humanity's past when AI servants collectively rebelled against their human masters.
The story of how humans ended up in star wars is pretty much a cosmic event sends a ship full of humans to another Galaxy in the distant past.
Now then as I was writing this story I wondered which 40k faction should I send to the star wars Galaxy?
While Ork or Eldar could make an interesting story but unfortunately I'm not really in writing Xeno story so I'll be writing only Human factions.
I thought a bit an eventually I narrowed down my choices to sending Forge world, Krieg or Macragge.
A Forge world a planet in which controlled by the adeptus mechanicus, responsible for the manufacture of weapons for humanities never ending wars.
Krieg a radiate death world, home to the renowned death Korps. They have vita technology giving them the ability to spam out entire armies. They defeat their enemies by simply throwing bodies at the enemy until they are overwhelmed. The death korps are indoctrinated into the cult of sacrifice since birth. Unfearing, unflinching and well trained, they will gladly match to their deaths.
Then there's Macragge home to the space marine chapter Ultramarines. It's said that in the modern 40k Macragge is the closest to the Imperium that the Emperor envisioned, despite being a populated world it has clear blue skies, clear seas timing with fish. Quite a rarity for such a technologically advanced place as most advanced worlds are pretty much industrial hive cities filled with pollution.
Which one should I chose?