Every company should have an acceptable murder rate!
That's a KILLER idea!
Unless you are suggesting he was using the term in jest as a nickname ("my little battalion") ... no. Military is super anal about using correct nomenclature.
Yes, but as already pointed out, this is not a professional military. It is a peasant militia. But going back to the original question about why Naf' allowed it to exist, I wondered that myself. A few possible explanations I came up with:
1. It could be that the Empire actually encouraged militias in outlying areas with the thought that they are peasant military forces that the Empire can call upon in times of need (or when the Empire needs cannon fodder troops to send in somewhere to minimize the casualties of the actual regular army).
2. Naf' knew about them, but did not know how big or organized they were, and did not take action because he did not see them as an actual threat.
3. Naf' didn't actually know about them.
4. Actual plot hole.
Who knows whether it is any of these options or something else?
It's just thrown-together samples, sadly. As someone else pointed out, he asks his battalion to march when they are already marching.
Well, yes and no. Although those two samples may literally seem inconsistent, I don't think it was a mistake or carelessness. I think they are both there just to add feel and texture, and not to be taken literally. The marching sound may not have been intended to indicate that soldiers are actually marching, but rather to just give a military feel to the passage. Or it may be meant to convey that one group was already marching, and the "battalion" that is being addressed is a separate group that are being ordered to attention and then ordered to march as well. Again, I think over-literalizing it to try to find supposed mistakes is missing the point.