War Against the Nightmare

The War Against the Nightmare was a conflict fought against the Emerald Nightmare.

The Nightmare Lord started attacking Azeroth soon after the end of the War against the Lich King. Though his plans had started hundreds of years before, the war itself began with people that could not wake up. They were lost in nightmares, and there was no way to let them out. A strange mist spread through the lands, a hearld of the nightmares. Shadowy figures started appearing throughout the world, and eventually even attacking the people. Later, the sleepers themselves turned into sleepwalkers, attacking everybody nearby as they relived their worst nightmares.

Meanwhile, the Nightmare Lord had turned almost all of the Emerald Dream into a nightmare, and though nature's defenders did not stop in their attacks, they seemed to have no effect in stopping the corruption. Malfurion Stormrage himself was trapped in the Nightmare, though with the help of some of his friends he was able to escape. Contacting every sentient and wild being that was awake in the world, Malfurion asked to sleep and lend their dreamforms to lead an attack in the Emerald Dream. The dreamform of Varian Wrynn led the troops.

On the waking world, and with the help of several druids, Malfurion was eventually able to destroy the Nightmare's Lord power source, both on the Emerald Dream and in Azeroth. With him gone, the nature and dreamform armies were able to rout and defeat the Nightmare, though a small pocket of it remained unconquered.

But Azeroth was not able to be in peace for long, as soon after came the Shattering.