Oh. Well now that hypnosis magic with berserker buffs are in the mix then yeah, that fort is not just getting raided, it's going to fall soon. But would Mekia forces occupy it? That doesn't seem like a good idea considering it's far from their country, so no supply lines or reinforcements.
Mekia's attack on a fort on the opposite, far side of Asbelt, far from their border still doesn't make much sense to me. Maybe it's to preemptively destroy the remnants of the Crimson Knights? Once word gets out of this unprovoked attack, war could happen between Asbelt and Mekia.
Then the Asbelt Empire will find itself fighting a two-front war, sandwiched between the Mekia Holy Land to the west and the Furnest Kingdom to the east.