If I could give half stars on Goodreads, this would probably be a 4.5 star review, because there were some problems with this book. Instead, I'll round up and use this review to talk about those problems.
First of all was the structure. Like several of the recent books in the series, Shadow of Victory covers territory that, chronologically speaking, was covered in previous books. It begins just after the Battle of Monica (note that The Shadow of Saganami, where the Battle of Monica actually happened, came out in 2004, when I was a high school freshman), and provides fleshed-out backstory for some of the revolutionary characters from Shadow of Freedom. The latter part was what I was most concerned about, because I felt it was largely unnecessary. These are characters who were introduced in medias res in the last book, and most of the new stuff in here was alluded to in their introduction.
Secondly, there's the language. There are two new planets that we see a lot of in this book, one of which is the Polish planet, and the other of which is the Czech planet. And the Polish planet, in particular, gets a lot of Polish words thrown in to provide authenticity. The problem with that is that I don't know shit about Polish. And when significant governmental positions or movements are described using words that I can't begin to even pronounce, this poses a slight problem. I can kind of gather what they mean from the text, but it's still a bit jarring.
Thirdly, there's the pace of the series as a whole. As I mentioned previously in this review, the first book in this side series of the Honorverse came out in October 2004. That's twelve years. In that time, I went from high school freshman to the third year of graduate school. This book did move the plot forward, but I feel like Weber has been getting bogged down a lot in side plots. In this book, we have a side plot in the Solarian League that is very similar to another side plot from previous books, and in fact brings in some of the characters from that other side plot. Was that necessary? I appreciate that he's trying to be very meticulous about world-building, but I kind of want to get to the ending at this point.
Aside from those criticisms, I felt like this was a fairly decent entry in the series. We got some added definition to some characters who have previously appeared, and there were some pretty decent action scenes. I'm still on board with the series, I'm just hoping that we see some resolution before any children I might have become old enough to read this series.