idk if anyone mentioned this yet or not but regarding how old Gregor was when he joined the army or g corps, i think he himself or someone stated in the eng translation of Canto 1 that he joined when he was 15
I would have to fact check that to be sure, because as far as I remember 15 is when the experiment finally ended
But, in regards to the smoke war thing and the timeline, there's been some discussion and people are speculating the smoke war was about ~20 years ago which would put Gregor at 15 for joining it. However this makes the point of our OTHER smoke war veteran, Roland, THIRTEEN when he joined the smoke war which doesn't add up for what we've seen in ruina. I don't think either of them were that young when joining the war














