Ken,
Are you interested in differentiating between the first enlistees and those who came later? This may not be on the same track, but I've always wanted to know the differences or demographics of the first group, who went off to war itching for a fight and those who came in the second year, motivated by desires on the Confederate side to resist invasion or on both sides to avenge a lost family member or something similar. I know from research of my own family, the boys of '61 were early to mid-twenties and unmarried. The second group in '62 were generally a little older and some were married. In one case, it appears one of my grandfathers, married, enlisted to resist Bragg's invasion of Kentucky (55th then 22nd Indiana) and with a Southern grandfather, married w/ 5 children) enlisted after the Yanks arrived in North Alabama and his oldest son had died as a member of the 17th Tennessee Infantry.
Jim Martin