The North has to be clear and secure from all enemies before they head south to deal with Perdan. This has and continues to be the prevailing strategy.
Except for the fact that Oligarch never intended to fight Sirion or anyone in the north (at least not at first) but was forced into war by Sirion. In fact it was Oligarch's goal (as stated also to Sirion) to wage war on Caligus in stead (whom was neutral at the time with Sirion as nobody in that council except Etchelion liked them in the first place). Sirion refused this and has continued war ever since. Even in the early days of Perdan/Vix' war on Eponllyn, Oligarch offered Sirion to march with them on Perdan and end hostilities in the north.
So while it may be the prevailing strategy now, it makes little sense when you say "has" really. Oligarch wasn't created in retalliation of Sirion or anything
