User blog comment:Miskos3/Fairy Tail 514: Dragon Seed, Review/@comment-26389992-20161212114731/@comment-7418318-20161212154950

The way I understood it prior to this chapter was that there was the Civil War, with Dragons vs. Dragons for the most part and then some Dragon Slayers near the end. And once Acno started his rampage, it seamlessly went over into the Dragon King Festival.

So yeah, technically seperate events, but they just as well might have been one. Just like the 100 year war in Europe was really two seperate wars, but history still recorded it as a single event.

But what Irene described here was the beginning of the war, which Zirconis refered to as the Dragon Civil War.