Final Fantasy 15's Latest Update Adds Story Content To Chapter 12
https://www.gamespot.com/articles/final-fantasy-15s-latest-update-adds-story-content/1100-6453692/
Final Fantasy XV's latest update is finally live on Xbox One and PS4. In addition to some small fixes and other additions, this updates drops in a fairly important story point--the Astral War.
Until now, this historical event is sidestepped in the main campaign. We know it happened, because much of the land in Lucis has scars from it, but we don't really know what happened and why. One of the few direct references to the war is a sidequest called "Aftermath of the Astral War" which sends you and your pals on a trip to take pictures of the Taelpar Crag.