Okay, I hate to do this, because of recent events, but, speaking as a "person of color", and one who has roots in the South, I could care less the "real" reasons for the Civil War. The fact of the matter is that the South, and in fact the United States for that matter, shouldn't have been engaged in the practice of slavery to begin with, especially given that the Declaration of Independence and the Bill of Rights (along with the US Constitution) was suppose to be documents sanctifying the rights of free men and democratic values. When talking about the justification for the Civil War, ultimately, there are victims involved: the men who actively fought the war, the destroyed lives (on both sides) as the result of the war, and the freed men women who, after so long, had to learn how to be citizens of a nation that may or may not be hostile to them. And because of this, I blame the gutless politicians who couldn't compromise on the issue of both slavery and states rights. But more to the point, I blamed the Founding Framers for the Civil War, for not having the foresight that a country built on the values of a democratic Republic will end up becoming a House Divided. Ergo, the roots of the Civil War can be found on the street corner of Cowardice and Convenience. And again, as a "minority", I could care less about the reasons for the Civil War, but I do care that my people were freed in the end.
As for this particular outing of STC: I liked it. The episode felt like a typical TOS episode. It was not a profound episode, however, and it seems to take elements of "Red Badge of Courage" as a means to tell a story. I think the episode would have been more interesting if Captain Kirk and Dr. McCoy were either on the same side (especially on the Confederate side), or were switched (with Kirk as the Confederate and McCoy as a Unionist). It would definitely be in keeping with the challenges that our characters would face. Also, on a technical side, I think the transition between the night campsite scene and the American, morning scene felt too "modern". I think it would have been better if there was a "hard break" (as if a commercial were to be placed in that transition moment). Also, the running time was a bit short. If you are not going to put in commercials in your episodes, the running time per episode should be no more than 51:50 minutes, which would be the length of a typical TOS episode anyway. Personally, to keep STC (and other TOS-oriented fan productions) "authentic", I would just put in fake or public domain commercials in the cuts. That way, the episodes would really feel authentic, but that's just me.
At any rate, good job! I can't wait until I see more...