I'd say it's less pacifist and more that it's akin to a hegemonic/almost hegemonic country that spent decades without getting in a near-peer conflict and thus their doctrines never got to evolve and thus starts to really rust despite technological advantages (see Russia during the start of the...
That's actually going to be an interesting point bc Gustav's whole reason for the war is unifying non-human races for a possible future conflict with Gloire or Camelot, so while he definitely is going to purge and try army officers, he might be tempted to try and integrate some like that Marine...
I was thinking about the possibility that her mom took it while pregnant with her and it's why she was born being able to metabolize it without even taking the drug itself, yeah.