The first ever Scenario in World of Warcraft that will herald a new age of war between Alliance and the Horde has been enabled on both European realms and Americas.

To have an instant queue for this Scenario you will either need two of your friends to join with you, or if you're queueing alone, you'll have to wait.

The minimum requirement for the Scenario is itemlevel 353 and level 85.

Make sure you check your in-game mail after you complete the Scenario.

Upon completion you get a Feat of Strength and of course, you'll be able to replay this Scenario along with others at level 90.

This Scenario is available from September 17 lasting through September 24.

Here we have a complete video footage of both Scenarios (Alliance & Horde PoV)

Alliance basically starts of where Horde left, you need to eliminate the remaining Horde forces in Theramore and protect Jaina, while she secures the Focusing Iris.

As the Horde, you must infiltrate Theramore and save its spy (a Sunreawers blood elf); upon completion, a bombing cutscene is played as an in-game video.

Alliance Players get Tabard of Theramore from Jaina after they complete the Scenario.

Here's a complete compilation of items  you can get after completing the Scenario.

Level	Type	Spec	Slot	Name
1	Other			Everlasting Alliance Firework
1	Other			Everlasting Horde Firework
1	Junk			Mini Mana Bomb (Horde)
1	Miscellaneous		Tabard	Theramore Tabard (Alliance)
384	Cloth	Spell Spirit	Head	Theramore Arcanist's Hat
384	Cloth	Spell DPS	Head	Squallshaper's Hat
384	Cloth	Spell DPS	Head	Rok'nah Hag's Hat
384	Leather	Spell Spirit	Head	Rok'nah Raider's Helm
384	Leather	Physical DPS	Head	Rok'nah Skirmisher's Helm
384	Mail	Spell Spirit	Head	Rok'nah Wolfcaller's Helm
384	Mail	Physical DPS	Head	Rok'nah Wolfstalker's Helm
384	Plate	Tank	Head	Golden Circlet
384	Plate	Melee	Head	Black Circlet
384	Plate	Spell Spirit	Head	Silver Circlet
384	Shield	Spell Spirit	Off Hand	Blood Guard's Shield
384	One-handed Axe	Physical DPS	One Hand	Overseer's Handaxe
384	Two-handed Axe	Melee	Two Hand	Grunt's Greataxe
384	Gun	Physical DPS	Ranged	Marine's Rifle
384	Polearm	Physical DPS	Two Hand	Skirmisher's Spear
384	One-handed Sword	Tank	One Hand	Captain's Cutlass
384	One-handed Sword	Melee	One Hand	Sailor's Scimitar
384	Staff	Spell Spirit	Two Hand	Staff of the Faithful
384	Staff	Spell DPS	Two Hand	Archmage's Staff
384	Dagger	Physical DPS	One Hand	Marksman's Blade