Score one for nationalism-bred hatred!
As for group history during the war, I'm assuming that, at the very least, we were members of the same platoon, regiment, company, what have you. I kind of like the notion of the various wars of attrition that took place during the Last War: Rekkenmark, the Cauldron, the Crying Fields, etc. Some of the nastiest fighting took place for nothing more than meters of muddy land. This would yield some mightily disenchanted veterans.
So, if we went with the Crying Fields in the Aundair/Thrane front, we could have been attached to commands at the Towers Vigilant and Valiant, switching between them as needed. And we could have gotten airship training by being part of an "airborne" company, sent to the hottest spots of battle along the front to bolster the defense whenever needed. We would've been dropped on lines to the ground, a la Black Hawk Down.
In the end, nothing was accomplished. We saw close friends killed on a daily basis and we saw squads mass-converted to the Silver Flame at swordpoint. We reaped no benefit, no revenge.
This would hurt our psyches even more, since we can trace our blood back to either Thaliost or the Thaliost peninsula, where our grandfathers or fathers (depending on race) fought and died during the sack of that city 68 years ago.
To tie the group to Thaliost in the present, I'd venture that we are either stationed at Fairhaven (the capital), or Stormhome. Stormhome might be great, because 1)it's a House Lyrandar enclave with an Aundairian base located there, thus providing an easy tie-in to airships and 2)it's a quick ride up Scions Sound to Thaliost.
I'm just floating these ideas, and I'm not tied to any of them, so feel free to disregard.