

Somewhere between most and all of the Ivalice games are confirmed to take place in the same timeline, though the entire place may just be a child’s dream so :shrug:
The timeline is something like XII->tactics a2->tactics->vagrant story->tactics advance, with legendary events between a2 and tactics that lock off magic.
Major spoilers for A2, but it opens at a school in the town of St. Ivalice before the protagonist awakens in Ivalice roughly circa ffxii. It eventually turns out that another kid at school found a magic book or something and recreated the world as they want it to be, so you have to get them to wake up to return the world to how it was.
Theres nothing in the game to clarify whether that means any of the events happened in the timeline or not, or what it means for the other games.