Mossflower

This first struck me as being a children's book, but it's primary theme is war with swords, spears, and bows and arrows. All the characters are woodland creatures. It's Wind in the Willows meets Game of Thrones.

I heard the BBC audiobook. The author is the narrator with others doing the voices of the characters. Some of them aren't great voice actors. Some of the characters are sqiddles, until I realized that's just how squirrels are pronounced by the narrator's Scottish accent.