Or it could just be the concept of fighting such a monolithic entity as the Shivans, who feel no remorse, give no quarter, and do not retreat.
Maybe, but I'm not entirely convinced. We don't see people who fought in the SSI defecting to the UEF left and right, so if he's saying that her reasons for aiding the enemy had something to do with experiences fighting the Shivans, he's talking about something specific to what the 14th went through. Also, this guy's a Captain. He's been in the service a long time, most likely long enough that he wouldn't need to rely on hearsay to know what fighting Shivans is like.
When would she have gone to one of the camps though? She didn't defect at the end of AoA.
Also this is the first I've heard of reeducation camps. Sounds like GTVA propaganda! Where else are they mentioned?
"My Brother, My Enemy". The debrief postulates that the GTVA views what happens to prisoners of war as a fate worse than death.
Carey almost had to have been in Sol at some point. There's no reason that someone not involved in Sol operations would have had access to the jump schedules.
As for how she got the information in the first place. Do you think she might have been cooperating with the Vasudans that sent Laporte that secret data?
I don't think so. Steele didn't bring in Vasudan logistic support until after the Agincourt was captured, so there's no reason the Vasudans would have known.
Guys...she was taken captive on Beta-Aquilae...not anywhere in Sol.
She was taken captive by the GTVA in Beta Aquilae a year and a half after the war started. We don't know what she was doing, or what happened to her, during the intervening time.