The easiest and most logical way to add a new division is to split the Military up. Rather than having them in charge of "enforcing order on a local and global level" make them only responsible for the global level and then put Alfheim: The White Knight in charge of the division for keeping local order. Basically instead of just a military division there would be a military division and a police division. Again that is just a thought another option be research and development type deal where the new division solely works on creating new ways to utilize Unity. These are just a couple ideas that I had and I do realize the first is currently part of the Military Division and the later is currently part of the Intelligence Division, most likely at least.