the First War (WoW)  

The First War was a conflict fought between orcs and humans after the Orcish clans arrived on Azeroth from Draenor. The human kingdom of Azeroth was completely destroyed and its survivors forced to flee to Lordaeron. While the timeline between the First and Second Wars has become somewhat blurred over time and changing rulers on both sides, it is known that during the invasion of the Horde, they were crushed by the Humans but made a second attempt.

Timeline

• The Horde conquers the planet Draenor.
• Orcish clans begin fighting amongst themselves soon after.
• The child-sorcerer Medivh is born of a relationship between the court Conjurer and a mysterious traveler.
• Llane is born to King Adamant Wrynn III and Lady Varia.
• Medivh falls into a coma and his father dies soon after.
• Medivh awakens from his six year coma the day that Llane becomes Prince of Azeroth, and begins work on the Dark Portal soon after. Warlocks on Draenor manage to find a small tear in the dimensional fabric and begin studying it, using this information to unite the Orcish Horde once again.
• The Dark Portal opens and the Horde begins their invasion.
• Initial battles do not go well for the Horde. Expecting an easy victory against a weak opponent, the orcs rush to assault the fortress of Stormwind Keep, only to suffer a catastrophic defeat.
• The Age of Chaos begins with the First War and the death of King Adamant.
• The Horde is humiliated by the rout and the clans descend into turmoil.
• Durotan, chieftain of the Frostwolf clan, is ambushed and slain by rival orcs. The assassins leave Durotan's infant son for dead, but the young orc is quickly discovered and saved by a band of humans under the command of Aedelas Blackmoore. The infant is taken as a slave and given the name Thrall.
• Gul'dan manipulates a ruthless dictator onto the throne of the Warchief. Known as Blackhand the Destroyer, the new Warchief rallies the clans back together again and prepares them for a new assault on Azeroth. The orcs begin raiding activities against outlying human settlements near the Black Morass.
• Medivh sends Gul'dan another vision, teasing him with images of the Tomb of Sargeras and the power it contains.
• The orcs bring reinforcements into Azeroth, decimating towns and villages and plundering everything in their path. Grand Hamlet and Sunnyglade are destroyed.
• Lord Anduin Lothar realizes Medivh's betrayal. He leads a small band of warriors to Medivh's tower and confronts the wizard. Lothar and Khadgar slay Medivh, but Sargeras' spirit escapes.
• While searching the mind of Medivh for the location of the Tomb of Sargeras, Gul'dan falls in a coma during the death of the Grand Magus, leaving Blackhand and the Shadow Council helpless.
• Blackhand the Destroyer is betrayed and slain by Orgrim Doomhammer. Doomhammer then replaces Blackhand as the Warchief of the Horde.
• Northshire, Goldshire, and Moonbrook are destroyed.
• Stormwind Keep falls to the Horde and is sacked. During the battle, King Llane is slain.
• Spies loyal to Orgrim Doomhammer capture and torture Garona. She reveals the existence of the Shadow Council and directs them to the location of Gul'dan's warlocks near the ruins of Stormwind Keep.
• Doomhammer dispatches his elite wolfriders to the ruins. They then slay or execute most of Gul'dan's warlocks and disperse the remaining members of the Shadow Council. Gul'dan awakens from his coma and pleads for mercy from Doomhammer, offering complete submission. Doomhammer accepts and grants him mercy.
• Lord Anduin Lothar concedes that the Kingdom of Azeroth has been lost. He rallies his countrymen and leads them in a desperate retreat across the Great Sea, eventually landing upon the shores of Lordaeron.
• The Warlocks resume their experiments on the portal.

World of Warcraft Wikibase™