This story is an AU to "The Salvation War" story by Sturt Slade, in it Heaven, closed everything and moved Heaven when Humanity conquered Hell, so "Pantheoncide" never happened, "Magic" was also a bit more understood by the demons among a few other things even though it didn't change the outcome of the war.
I'll call it The Apotheosis verse.
The prologue is very short but other chapters will be longer.
Also, please note that unlike the original author, I do not have a connection with the military, nor am I the most knowledgeable about science, I know quite a bit, but not everything and the setting itself has special physics in the first place.
Also, this verse ISN'T about the military or Humanity, Fuck Yeah but about humanity's interactions with other species.
It had been two decades since The Message.
The event that had changed the world and put a before and after in human history.
Humanity had fought Hell itself and won.
Now they were looking to conquer Heaven.
But Heaven had disappeared, gone in search of a more obedient race, as they had said in the message.
And now, we were looking for them.
We have started experimenting with magic, it turned out to be quite similar to Lovecraft's interpretation of the term, physics that hadn't been discovered yet.
We started being able to manipulate a strange and mysterious dark colored energy and are still investigating it.
We made many advances, both in our technology and in demonic one.
One day, we will find them.