Yeah,I'm a nitpick. But I somehow feel that we should be presented with some marks that will display our troops as "ours", "ones that serve to that specific stronghold", you know? Like there were Greycloaks, but there we had just a section of the existing unit that serves to us and get referenced as "our", no Whitecloaks or Blackcloaks to call our own. And this is (I guess) an advanced version of the stronghold concept. We could still have a tailor or such that would allow us to have our own flags and colors.
Maybe it really is hard to do, I don't know, but societies have that trend, even in fantasy setting. It's not exactly new. That trend follows us throughout history, it remained in sports, jobs, military (specific unit marking). When you get a job as a guard, you are usually given something, a uniform,logo on a tagplate or cloth, etc. specific enough to mark you as one working for your employer,no? Atleast you are required the "black tuxedo guard" stereotype . Trend,one of the oldest that remained up to this day. We all like it in one way or another. I like the black&white of my football (you call it soccer) team,and I wear it somewhere on me when they play to mark myself as one of theirs.