Records indicate that the worgen existed for a time in Kalimdor. In fact, more recent evidence suggests that their true origin might have a connection to the night elves and a secretive druidic order from Kalimdor's distant past. Yet until new evidence comes to light, this information remains speculative.
The worgen's first verified appearance in the Eastern Kingdoms has been traced back to the Third War, when the archmage Arugal utilized the wolf-beasts as a weapon against the Scourge. Arugal's weapons soon turned against him, however, as the curse of the worgen rapidly spread among the human population, transforming ordinary men and women into ravenous, feral creatures.
Arugal adopted many of the worgen as his own and retreated to the former mansion of Baron Silverlaine, the estate now known as Shadowfang Keep. The curse, however, was not contained. It persisted in the lands of Silverpine and extended even into the fabled walled nation of Gilneas, where the curse rapidly reached pandemic levels.
The citizens of Gilneas found themselves trapped, with no hope of escape. They retreated deeper within the isolated domain, and there they survived, fearful of the savage presence that lurked just outside the barricades.
Tensions among the displaced citizens escalated over time, resulting in a civil war that now threatens to destabilize the embattled nation even more.
There are those among the Gilneans, however, who cling to hope. Many believe that a treatment for the worgen curse may exist, although others have nearly given up, fearful that if the barricades should fall, their humanity will be lost forever.