A lot of that is simply evolution of M&W categories over the years. As leader of M&W, I can tell you that in order to use stickers for the profiles, the categories need to be in a Unit, Branch, War naming scheme. So, part of the reason that the evolution of the names occurred is that PMs entered the information into a sticker, the category was a red-link, so we created the category. Battalion levels have been established in some regiments, so it's ok to create other ones. Just remember naming schemes and don't use something like 1/4 Battalion. (the / is not to be used in category names). That would be 1st 4th Battalion.