A region of space coreward of Terra, stretching roughly from Tukayyid back to the Periphery. Initially it was made up of the four Invading Clans; namely Wolf, Jade Falcon, Ghost Bear, and Smoke Jaguar. After the death of ilKhan Leo Showers, Clans Steel Viper and Nova Cat also carved out occupation zones of their own. Since 3051, the Clan Occupation Zones have seen a good deal of change, with the various Jade Falcon Incursions, the Steel Vipers returning to the Clan Homeworlds, and the destruction of Clan Smoke Jaguar during Operation Bulldog all taking their toll.