Yeah, technically its "Before the Dawn" at the end of that long quest chain. I would say that the storyline starts to veer into HW after the fight with Ramuh. Previous to that, youre dealing with mostly issues for the Eorzean Alliance. After that, you start to spend a lot of time working on Ishgardian issues(trying to get them to join said alliance for instance). After Ramuh the storyline directs you to fight 2 dungeons and 2 trials that have a distinctly Ishgardian interest(along with the usual smattering of quests), while only one trial(and no dungeons) that are more generically Eorzean(optional content doesnt count, as you could easily skip it all).