Bolo!

This was the book that got me into Bolo books. I've read most of the rest at this point, and have really enjoyed a bunch of them, but to me, Weber's Bolo books are THE Bolo books. They get it. The scope of the timeline and the conflicts, the genuine partnership between humans and AIs. From postapoclyptic earth through the rise and fall of several interstellar empires, humans and absurdly giant tanks against the universe. The first short story in this one is the weakest, but the book overall and his other Bolo books are so worth reading.

Easily my second favorite Bolo book, with Old Soliders being the favorite.