The battle of Armageddon is one of those things that gets floated in abrahamic circles but isn’t really textually supported, mostly because it’s a prophecy that entered them from the outside, the prophecy originates in the aftermath of an especially gruesome battle fought between the Hittites and Egyptians. It was so brutal that the locals began saying that the next time something like that happened it would be the end of the world and the “prophecy” just spiraled from there.
It’s like the antichrist, yes some theological text is out there on the subject, yes there may be some vague “prophecies” about it, but if someone is significantly invested in it pertaining to near future events, they’re either a lunatic or someone who’s learned to make a steady living off the backs of lunatics.
They’re literally just death cultists, and I don’t mean like the fictionalised trope of worshippers of archliches and what not, I mean they worship the day of all ends and especially worship the notion that it will come soon and let them point and laugh at all the people who actually went about living in virtue regardless of if it would or wouldn’t happen, as the fucking book it’s loosely atested in intends for you to do.
I swear to god there is nothing more destructive you can bake into a religion or ideology than some vision of a prophetic future day of great upheaval and vindication, because then the adherents will develop a cancer of inactivity in doing the good work because, “hey, the day of prophecy is coming any day now! Why waste all this effort on building a world where it isn’t needed?”