A One-Round Living Greyhawk Ratik "Mini" Regional Adventure
From the introduction:
Armat Ukakane has left his clan holdings in order to assist in the battle at Kalmar Pass. Through stealth and subterfuge, using small units of Ratik soldiers in strategic strikes, his tactics have begun to take their toll on the giants and goblinoids holding the pass. You now join one of the tactical groups known as "Armat’s Rogues" in a covert strike against the monsters guarding Kalmar Pass. With his help, it seems that the long stalemate with the Bonemarch forces may break.
Part one of the Ratikhill Trilogy.