I would say that the faculty gang at CGSC only wants you to succeed. So, it is a question of compatible interests and temperments for your committee. Nobody really needs to be an expert on your narrow subject but the historians will know the literature and will refer you to it. You know that you are not limited to CGSC faculty - other personnel assigned to CAC and Leavenworth can serve. Any questions on that should go to Dr Bob Baumann. See my previous reply for suggestions for committee members among the folk I know. PM me if you want to consult.

Good luck

JohnT