But the fact is that they don't use that term ("Field Colonel"). It's not part of the Star Trek universe. So why the hell does MA insist on listing it?
Ooooooooh! My, my, my, we're getting just a little bit TOUCHY about all this, aren't we? Why does this term threaten you so much, eh?
Agreed, it may not have been spoken onscreen. But as soon as I put on my care face, I'll be sure and think about thinking about that.
If it's in the script, it's good enough for me. As you pointed out, the Militia does have at least two different grades of colonel. So who the hell cares what they call them