Warcraft: Orcs & Humans is a real-time strategy game (RTS) developed and published by Blizzard Entertainment. The Orcs originated from another world, Draenor, where the orcs, once a peaceful race, became bloodthirsty from the blood of a pitlord. However, their Warlocks remained aloof, devoting their time to the research of magic. The Warlocks noticed a rift between the dimensions and, after many years, opened a small portal to another world. One Warlock explored and found a region, called Azeroth by its Human inhabitants, from which the Warlock returned with strange plants as evidence of his discovery. The Orcs enlarged the portal until they could transport seven warriors, who massacred a Human village. The raiding party brought back samples of good food and fine worksmanship, and a report that the Humans were defenseless. The Orcs' raiding parties grew larger and bolder, until they assaulted Azeroth's principal castle. However, the Humans had been training warriors of their own, especially the mounted, heavily armed Knights. These, assisted by Human Sorcerers, gradually forced the Orcs to retreat through the portal, which the Humans had not discovered. For the next fifteen years, one faction of Orcs demanded that the portal be closed. However a chief of exceptional cunning realized that the Humans, although out-numbered, had prevailed through the use of superior tactics, organization, and by magic. He united the clans, imposed discipline on their army and sought new spells from the Warlocks and Necromancers. Their combined forces were ready to overthrow the Humans.