The men are mice and the orcs are rats! There's battles and long journeys and riddles and feasts. There's so many books it may be hard to decided where to start, but my first was Marlfox and it was randomly in the middle. I'd recommend beginning with Redwall (first published) to get a feel for the world. And if you like it, read Mossflower, Martin the Warrior, and The Legend of Lukeโin that order.
Oof, I get emotional just thinking of those last three. Due for a re-read.