The Death of Archimonde

Kalimdor, in the language of the night elves, meant 'the land of eternal starlight'. Before the War of the Ancients, this continent had once been the only continent on Azeroth. But later, because of the invasion of the Burning Legion, the Well of Eternity had exploded, and this continent had been blasted into pieces. The two largest pieces that split apart were the current Eastern Kingdoms and Northrend.

After the Highborne followed Queen Azshara to the bottom of the sea, the night elves inherited the continent in the west and continued to use the name Kalimdor. Over the next ten thousand years, they continuously planted trees, forming an immense forest. This forest was known as Ashenvale, and the entire forest surrounded the night elves' sacred mountain, Mount Hyjal, and guarded the World Tree Nordrassil. And Nordrassil's power spread throughout the land through the forest, slowly repairing the damage caused by the explosion of the Well of Eternity.