Deed of Paksenarrion trilogy
https://en.wikipedia.org/wiki/The_Deed_of_Paksenarrion
A couple of things are notable about this series.
First, it stays very close to the D&D formula. It borrows as heavily from D&D as D&D borrows from Tolkien. In fact, the whole thing reads like you're listening in on someone else's pen & paper D&D game (provided the game was being played by fantasy authors instead of
your friends). While this does show a certain lack of creativity, it's also what's fun about it. If you ever played tabletop D&D, this will make you feel nostalgic.
Second is the interesting perspective. Normally, we start with a lowly protagonist who is right away thrown in with the powerful movers and shakers of their world and instantly begin to have a global impact with their decisions. In this story, you follow a runaway sheepfarmer's daughter who has to bite, scratch, and claw her way to the top, and by the time she is thundering among the movers and shakers of her world, you really feel that's she's
earned it. For most of the series, you feel as though you're getting bottom-up view of this world instead of a top-down view like you would get in a more typical fantasy story.
Lastly, the author goes into incredible detail about life in a military unit in a pre-gunpowder civilization. In the first chapters, you spend a lot of time learning details of how soldiers are trained to march, and the proper way to dig latrines. Later, as she becomes a veteran in a mercenary company, you learn the gritty details of sanitation during a siege. In many ways, this reads like a swords 'n sorcery version of Tom Clancy, but with latrine pits instead of high tech self-guided missiles.
No other fantasy series I know of goes into quite so much detail about logistics.
