Warcraft: Orcs And Humans Guide

The story of (commonly known as the First War ) centers on the sudden, violent clash between the noble Human kingdom of Azeroth and the invading Orcish Horde from the world of Draenor.

: On Draenor, the warlock Gul'dan was manipulated into corrupting the orcs with demonic blood, turning them into a bloodthirsty Horde. Warcraft: Orcs and Humans

: Khadgar (Medivh’s apprentice) and Lothar eventually discovered Medivh’s betrayal. They led an assault on his tower, Karazhan, and executed him to stop the demonic influence. The story of (commonly known as the First

For the Orcs, Azeroth was a new world to conquer as their own home, Draenor, was dying. They led an assault on his tower, Karazhan,

: Sargeras possessed the human sorcerer Medivh in Azeroth. Together, Medivh and Gul'dan performed a ritual to open the Dark Portal , a dimensional rift connecting their two worlds. The Human Perspective: A Kingdom Under Siege

The Humans of initially viewed the orcs as mere "beasts" or "monsters" from the swamps.

The war was not a random occurrence but the result of a long-term plot by the fallen titan , leader of the demonic Burning Legion.