Istivin : City of Shadows.
In the late 1980s, TSR, Inc., the publisher of Dungeons & Dragons, had been disappointed by declining sales of the Greyhawk product line. TSR therefore decided to make a significant change to the setting to re-invigorate customer interest and sales of Greyhawk-related materials. The Greyhawk Wars was the in-game catalyst used to allow TSR game developers, to take the setting in a new direction.
Initial hostilities were provoked by the evil demigod Iuz, but rapidly expanded to cover most of the Flanaess as opportunistic nations used the conflict to further their own ends. This conflict saw the unification and expansion of the Orcish Empire of the Pomarj as well as a desperate attempt by the Great Kingdom to reclaim its former glories.
The wars were ended in 584 when the final truce was brokered in the Free City of Greyhawk, and the war has come to be named for the city as a result.This was published in 1992 as a boxed set entitled From the Ashes. The boxed set detailed the situation on the Flanaess in the aftermath of the Greyhawk Wars. From the Ashes was followed in 1993 by a series of sourcebooks and modules providing additional information regarding the updated setting, including The Marklands, Iuz the Evil, and City of Skulls.
The tone of the post-Wars material was intentionally darker and more grim than pre-Wars TSR publications. These changes generated mixed reactions from fans of the setting, failed to sufficiently revive sales and led to TSR’s cancellation of the product line in late 1993.