Quote Originally Posted by Anonymoose View Post
If we rule out Othardian primals as a mistaken assumption, we're left with... perhaps the "mysterious primal" that interrupted the post-Ala Mhigo advance, if that wasn't itself referring to Leviathan, Titan, and Garuda in '62.
Quote Originally Posted by Cilia View Post
That... still leaves Mysterious Primal X, summoned during the conquest of Ala Mhigo, unaccounted for though... I think. Ala Mhigo was conquered before Silvertear, that much is certain, and a primal was reportedly summoned in the region as a consequence.
Quote Originally Posted by Mieck View Post
That's correct, and although I don't have the book to hand to confirm, I think it was at least a couple of years before Gyr Abania was secure and Gaius set sights on Silvertear Lake.
As far as I know, the lore book glosses right over this. The sole remaining citation that I recall is the Realm Reborn fansite, which says that the advance was halted by a primal "shortly after" Ala Mhigo was taken. Most modern recaps have the XIVth legion take Ala Mhigo, spend a while securing Ala Mhigo, then off they go to the fated Battle of Silvertear Skies and make a swift retreat from Midgardsormr and suddenly there are primals.

I would have written it off as poor phrasing years ago if Oda-san and Koji hadn't hinted that there was always something planned to be hiding in that gray area that we just hadn't been told about, and as of 2014 might still show up. However, in 2018 it's possible this was just abandoned and the Truth is what the lore book says.