Hall of Defense is a building on the planet Makkahn Ahk. This large round building encloses a circular courtyard suitable for enjoyment contemplation of Defensemen working here. The building houses laboratories and libraries, and martial training facilities and shooting ranges. Some young Försvarsmän live here, but most of them live elsewhere in the unit. Although Koaka city does not have a jail, all SGC team member who "caught" or considered to be dangerous to be Hall of Defence and placed in a locked room under guard. (RPG: "First Steps: The Stargate Unexplored Worlds Roleplaying Sourcebook")