Men at Arms is the 15th Discworld novel by Terry Pratchett first published in 1993. It is the second novel about the Ankh-Morpork City Watch on the Discworld. Lance-constable Angua von Überwald, later in the series promoted to the rank of Sergeant, is introduced in this book. Lance-constable (in the course of the novel promoted to Acting-constable) Detritus is introduced as a new member of the watch as well, though he had already appeared in other Discworld novels, most notably in Moving Pictures. Also notable is the only appearance of Lance-constable Cuddy (also promoted to Acting-constable).
There's evil in the air and murder afoot. The City Watch needs all the help it can get, as Captain Vimes is about to hang up his badge.