I always wondered this ever since the Baelsar's Wall instance and onward. Most of Stormblood I thought to myself "We're poking the hive, we're gonna get it now." However as shown in Stormblood we managed to retake two territories, though somewhat at a high cost.

Does Garlemald have enough to go full out and wipe us all out? I always felt that they did but they were busy with things back on their own homeland. If they wanted to, could they indeed just obliterate the Eorzean Alliance?