Board Thread:Speculation House/@comment-2020973-20200210012954/@comment-27745396-20200215084805

Pretty sure it was said (and showed) in V3 that Winter returned to Atlas soon after her summoning lesson with Weiss.

And about why there were no Huntsmen in Mantle. It has been at least heavily implied that Huntsmen graduaiting from Atlas Academy join military. They all might end up becoming specialists, but I wouldn't be surprised either if AA was Remnants equivalent of Military Officer School (meaning that a graduated Huntsman would be automatically a lieutenant of short).

My point is that there is a posibility that at least some of the soldiers and/or higher officers we saw during the volume might have been Huntsmen.