Whew! Mr. Turtledove went a little "Game of Thrones" in this one, what with all of the characters dying (no, I won't mention who - sometimes, but only sometimes, I won't give away the story). Some, of course, are people I won't really miss, and some are people whom, while I didn't necessarily care for their overall story-arc, I did appreciate their point of view on the events unfolding. Of course, as time is passing and others are becoming adults, we are also meeting new characters - however, as of yet, I'm not really enjoying any of them.
Having said all of that, there are a couple of characters who are, by far, my favorite and, whom in my opinion, are the "main characters" of the story. First would have to be Abner Dowling (Brigadier General Dowling by the end of this book), who seems to be a sort of "every man" that I can find myself easily identifying with as I read. Sure, he and I may not always see eye-to-eye, for he is an ardent Democrat and I a Socialist; however, the same level of "common sense" seems to be shared between us. Mayhaps Flora Hamburger/Blackford serves the same role for a female reader?
Second, would be Clarence Potter (also General by the end of this book), who is almost a sort of counterpart, in my humble opinion, to Dowling (and thus equally, Anne Colton?). Potter's need to "make peace with the system that he is vehemently opposed to for the perceived 'greater good'" is something that lies near and dear to mine own life. Recognizing that one is good at something, even if one needs to employ that in an unideal setting and ultimately seems to help one's "enemies," is almost a mantra of the modern age.
I also understand many complaints that Mr. Turtledove is very repetitive, for he often mentions a factoid about a character again and again and again...or loves to employ the same descriptors; I can't tell you how many people are described as having a "map of Ireland on their face". And I've never known so many people to consume so many eggs so often. But, I also don't think that I'm the average reader. For someone who only reads a couple of dozen pages per day, if that, and thus may take a month or more to finish this rather weighty tome, constant refreshers may be appropriate.