This won't add much, especially to John's excellent research, but I add it just on the chance it may help. The officer role of Company H, 29th Missouri Infantry Regiment in the 1865 MO Adjutant General's report shows Nathaniel A. Cole was placed in his role as company commander as of 19 September 1862, listed his address as Cameron, MO, and resigned 21 March 21, 1863 on page 220.

Cameron itself at the far northeast corner of Clinton County near the intersection of Clinton with DeKalb, Caldwell, and Ray Counties and was a stop on the Hannibal and St. Joseph Railroad. I imagine Cameron's location served as an excellent rallying point for the recruiters and organizers of this regiment in early to middle September 1862. By September 1862 the Civil War and also it's guerrilla phase was in full swing across the state and the large numbers of southern sympathizers in that part of northwest Misssouri surely made recruiting that Yankee regiment a tense situation. Of course, men born in Massachusetts in that region would have been obvious in an area full of people born in Illinois, Ohio, Kentucky, Tennessee, and Virginia. I know this well since, although I lived in Maryland, Texas, and Missouri, my own father was Massachusetts-born and he had only to say more than two words and any hearer would instantly know he was from NE US. I had no such accent, but as a kid in Texas, I was frequently called "Yankee" by the other boys. I learned not to pay attention to that, but then, that was not in the middle of a war between northerners and southerners.

Bruce Nichols