Tanaan Jungle is a region located in eastern Draenor. Home to the Bleeding Hollow clan, Tanaan Jungle serves as the seat of the Iron Horde's dominion over Draenor. Tanaan Jungle also houses the recently constructed Dark Portal that serves as a time-space gateway between Draenor and Azeroth. The Azerothian expedition mounts a counter-offensive against Iron Horde's operations in their homeworld in a desperate bid to shut down the gateway, with heavy losses that force the remnants to escape elsewhere in order to find allies.

When Draenor shattered and became Outland, Tanaan Jungle suffered a lot with the loss of the lush jungles that composed its original name, becoming the wasteland known today as Hellfire Peninsula.