Ankh-Morpork City Watch

From left to right:

Sergeant Detritus (troll), Sergeant Cheery Littlebottom (female dwarf), Sergeant Angua von Überwald (female werewolf), Captain Carrot Ironfoundersson (two metres but adopted as a dwarf...), Commander Sir Samuel Vimes, Sergeant Fred Colon, Corporal Nobby Nobbs ( carrying a certificate to prove that he's a human being), Constable Visit-the-Infidel-with-Explanatory-Pamphlets, Constable Reginald Shoe (undead) and Constable Dorfl (golem).

Done