FE Universes and the Main Timeline

So, since Meep asked this, I decided to elaborate so all could understand the FE Universe. First and foremost, Magvel (8), Elibe (6/7), and Tellius (9-10), seem to happen within their own unique universes. Now comes the fun part.

Genealogy occurs prior to Marth's games, since the weapons of Genealogy are in Awakening, further implored by Naga being in Genealogy. This is the same Naga, who before giving birth to Tiki, aided the Crusaders by giving them their blood alongside Salamander, Forseti, etc. This all happens roughly 2k years before Shadow Dragon. There are hints of Loptyr's blood surviving (I believe Sara and Julia) as well as Naga blood relatives (Julia again) who may be the catalysts for making Grima, but that's all a theory.Genealogy is a prequel, and sets up the world of Awakening since it links the brands (unique to Genealogy) for appearing in Echoes and in Awakening.

After 2k years or so, Anri and Marth's story takes place. Not going to go into spoilers.Now, in between Shadow Dragon and New Mysery, Echoes takes place, whereas Duma and Mila were banished by Naga due to infighting around Genealogies time, in which they founded their countries (the two continents are in the same world in Awakening, whereas Valentia's Mila Tree is where Tiki sleeps). Furthermore, Naga died during Shadow dragon (or some time before that), but was reborn in New Mystery (Nagi is litearlly Naga from Awakening.) This is where Marth goes through his tale and when Tiki is put to sleep (to get Nagi to appear, Tiki must "die" in New Mystery, when a character specifies that she's in a "deep sleep" ) she is "reborn" in a time of need, akin to how Tiki took the mantle of Naga (or how Tiki in New Mystery sleeps instead of flat out dying)

Then we have Awakening, which most here probably know about at least, so I'll save the details.

Now, the thing to note is that there are dips and some unique situations. Fates is an unknown, but Chrom mentions Hoshido and Nohr being lands of legend in Ylisse, and if they dont know about the Radiant Hero Ike (I don't think they knew about it if I recollect) then its unlikely that they're referencing to Outrealm gate lore, which implies a connection to the ages when dragons still ran rampant, but I digress.
Tellius however is linked to Archanea now, since Ike's descendant Priam is in the Archanea verse (further cemented by his ending and Priam's extended cipher lore, which doesn't contradict Ike's ending). Priam also holds Ragnell (which Ike left with) and what seems to be his scarft, implying his heritage (or at least direct connection to Ike) but this is up for debate since players tend to void him due to a popular "ship" between characters.

And that should be all the wonky universe/time travel nonesense.

So, in short, almost all of the games happen in the same universe (we don't know about Fates or 3 Houses yet), and as such is pretty confusing. I'll leave a link to the main timeline (doesn't include inter universe, there's other timelines for that) below for your own reading. Hope this helped for those that really didn't know!

Oh yeah any questions lemme know (I know a fair bit but I'm no expert so I'll do what I can :D)
https://fireemblemwiki.org/wiki/Timeline_of_Archanea,_Valentia_and_Jugdral

PS: The way they date Jugdral before Marth is due to the way Tiki says she met an ancestor of Chrom's before Anri. This dates that she met somebody between Anri and Seliph's time. However due to Tiki not being alive,it is safe to say that these dates may be about 1k years or so off. However it is know that she is referencing to Anri or a family member of his and not Genealogy, since she was not alive/around at that time.

PPS: thanks for reading this word wall and I may not answer super quick. Kinda got a headache cause Calc 3 is ass.