Board Thread:Speculation House/@comment-27265101-20170116064051/@comment-5430952-20170116082040

Menagerie didn't become a settlement until after the Great War, so that would explain why there were no casualties there, no one lived there at the time. As for the presence of Grimm on the island, that hasn't been proven either way, maybe we'll find out come the season finale, when Adam arrives in Menagerie. Though that's provided he's not already there, we'll find out soon enough.