@TurtleSquish once sorted all the fanfics into different epochs here. Currently, all gameplay takes place within the 14th, though we may eventually go back to the 12th, once Titans are added. That’s not quite what you were talking about, but it’s related. The list was sorted by humans and Titans and the wars between them, and in-game, we may see similar:
1.Age of Goblin Raiders
2.The Goblin Offensive
3.Orc War
…
n.Titans
Within these broader spans of time, your actions will affect the world around you in other ways to the extent that they set up the game master to. A lot of it, though, will be divided up based on the way you view your city at the time, rather than actual scripted stuff.