Kehjistan is a land to the east which include cities like Caldeum, Viz-jun and Kurast. Emperor Hakan was the last regent to rule the country in prosperity. As he be came ill and his son took over, incompetence ruled the land and much fell to ruins and slum. The intolerant Zakarum religion re-emerged, and quarrelled with Caldeum's mage class.
On the eastern edge of the Twin Seas lie the emerald jungles of Kehjistan. Several thousand years ago, hunter-gatherers found themselves drawn to the lush, fertile rain forests and bountiful game inhabiting Kehjistan. But there was something else; Kehjistan's geography was rife with nodes of magical energies, and eventually those with innate, arcane abilities began to sense and recognize these forces, gathering in groups to settle these special areas. It was here that the original mage clans, the Vizjerei, the Ennead and the Ammuit, were founded. Unfortunately the history of Kehjistan is not a peaceful one, and the Mage Clan Wars that erupted nearly destroyed the clans.
Geographically, Kehjistan encompasses almost one-third of Sanctuary's eastern hemisphere. With an average rainfall of over four hundred inches per year, Kehjistan has the largest rainforests in the known world. This huge expanse of jungle feeds the Argentek River, which is the longest, widest river in Sanctuary. Hundreds of smaller rivers and tributaries twist and turn their way through the lush tropical forests until they finally unite with the mighty Argentek. Herbalists and alchemists revere the rainforest environment for its ecological diversity. Until recently, these sages would come from far and wide to study and collect the rare plants and animals that make their homes here. Now the jungle is far too dangerous to visit, let alone inhabit.
More Information
This is just part of the material available on this topic. The Diablo 2 Wiki 'Kehjistan' article is also available in the main wiki where a lot of new information has also been made available after the announcement of Diablo III. You can find it here: