Alliance–Horde War

The Alliance–Horde War is an intercontinental war that began shortly after the Cataclysm, as part of the expansion set World of Warcraft: Cataclysm.

Background
Five years after the Battle for Mount Hyjal, the fragile truce between the Horde and Alliance had all but evaporated. In the wake of the Third War and The Founding of Durotar, the Forsaken entered a partnership of convenience with the Horde while the night elves and gnomes emerged from ages of solitude to join the Alliance. For another year the armistice held, though tensions continued to mount as worldwide conflicts drew the two sides closer to all-out war and fighting erupted in strategic battlegrounds. Despite these frequent skirmishes, the Horde and Alliance often set aside their differences and joined forces to face a number of threats. In time the blood elves and draenei led them through the Dark Portal to wage the War in Outland against the Burning Legion.

Following the year-long campaign in Outland, the Horde returned to Azeroth with a new ally in the Mag'har, led by Garrosh Hellscream. Soon, the long-missing Varian Wrynn put an end to 's schemes and returned to reclaim the throne of Stormwind. Attempts at diplomacy between Thrall and Wrynn soon fell apart as a peace conference in Theramore was ambushed by the Twilight's Hammer. Attention quickly turned northward, however, as the looming threat of the bore down on the mortal races of Azeroth.

Garrosh Hellscream and Varian Wrynn, appointed as the supreme commanders of the Horde Expedition and Alliance Vanguard respectively, who had previously butted heads in Theramore, led their forces to Northrend where they waged war against the Scourge. Though fighting a common enemy, tensions between the Horde and Alliance grew swiftly until spilling over after the Battle of Angrathar the Wrathgate. During the resulting Battle for the Undercity, Varian Wrynn, grief-stricken over the loss of, and the state of the former Capital City of Lordaeron, lashed out at Thrall and declared war against the Horde. Hostilities continued to escalate for the remainder of the War against the Lich King, until the Lich King was finally defeated.

With both factions recovering from war, the Alliance and Horde attempt to resume their tentative peace. Yet political tensions rise as the night elves of Darnassus have refused trade with the Horde and barred them from Ashenvale in protest of the Wrathgate. Relations worsen as Twilight Hammer orcs under the guise of Horde forces, kill and skin night elf sentinels to frame the Horde. In an effort to quell the rising tensions, Hamuul Runetotem attempted to pursue diplomatic talks with his fellow night elf druids. Yet the talks became violent when the druid meeting was attacked by Twilight Hammer orcs believed to be sent by Garrosh Hellscream, acting warchief of the Horde.

Three years have passed since the military forces of the Horde and Alliance first set foot on the shores of Northrend, and they now wage war amidst the disasters wrought by 's return to the world. Thrall has left the Horde to lead the Earthen Ring's efforts in preventing the rift beneath the Maelstrom from tearing apart the world, and has appointed the ambitious Garrosh Hellscream as Warchief of the Horde in his absence. King Varian Wrynn, convinced that the Horde has remained unchecked for too long, continues to lead the Alliance.

Eastern Kingdoms
Employing the Val'kyr to raise a mighty army, the Forsaken have begun a bold campaign to secure their hold over Lordaeron.

By orders of the new Warchief of the Horde, Garrosh Hellscream, the Forsaken mobilize and move into Gilneas to secure a port for the Horde in southern Lordaeron. The Forsaken have conquered much of Silverpine Forest, and have been battering the Greymane Wall with their siege weapons. The Forsaken soon aligned themselves with Ralaar Fangfire and his Gilnean Wolfcult and helped him infiltrate Gilneas so that he could spread the worgen curse and sow civil discord in Gilneas. The Cataclysm then caused the Greymane Wall and many of the nation's defenses to fall, allowing the Forsaken to invade freely. The Gilneans, now transformed into worgen, attempt to fight off the invaders as best they can. Eventually the night elves arrive in Gilneas, bringing both vital military aid and the truth behind the worgen curse. Likewise, Orcs reinforce the Forsaken forces, causing an escalation into an all-out battle between the Alliance and the Horde in the region. The Forsaken, against the orders of the Warchief to cease production, unleash their devastating Forsaken Blight against Gilneas. Many of the survivors flee across the sea to Teldrassil, where the night elves grant them sanctuary.

The Forsaken forces later march onto the town of Southshore and completely annihilated all life with in the region by deploying the New Plague. Magistrate Henry Maleb led the ones who managed to escape Southshore and fled to the town of Hillsbrad Fields. The Ruins of Southshore is left inhospitable, and will be so for several decades. The ramifications of the Forsaken Blight forced the high echelons of the Horde to reconsider the free use of such a potent weapon. Instead, the Horde has issued a diluted version of the Forsaken Blight for the Forsaken to use.

The town of Hillsbrad Fields was later attacked by the Forsaken. Magistrate Henry Maleb led the Hillsbrad Refugees to Fenris Keep, where they have been taking refuge. A few Hillsbrad residents and Magistrate Burnside stayed behind and led a resistance but were eventually defeated and imprisoned by the Forsaken war machine. Those who stayed to defend Hillsbrad eventually became prisoners in what is now known as the Sludge Fields, a Forsaken prison where the mad Warden Stillwater cruelly experiments on his prisoners and even fellow Forsaken. When the other Forsaken discover that Forsaken are being turned mindless, he is punished for his illdoings.

Even with Gilneas falling into the hands of the Forsaken, the fighting between the Gilnean worgen and the Forsaken continues. Bloodfang worgen who had recently allied themselves with the Gilneas Liberation Front, destroyed three Orc gunships that had arrived. The ships were full of supplies, weapons and soldiers. Later, the Forsaken kill some of the Hillsbrad refugees on Fenris Isle and resurrected them, bolstering Forsaken forces and somewhat making up for the loss of the three orc gunships. However, after this attack, many of the Hillsbrad refugees decide to take the Worgen curse offered by Darius, rather than be resurrected as Forsaken. Later, the Forsaken discovered that lord Darius Crowley and Ivar Bloodfang are having a meeting in Deep Elem Mine, and Sylvanas sent a squadron of elite Veteran Forsaken Troopers under the leadership of Master Forteski to trap and slay the Worgen leaders. However, the Forsaken soon discovered that instead of trapping an enemy, they were trapped themselves. As a result, the whole squadron of elite Forsaken Troopers were destroyed.

A convoy of Veteran Forsaken Troopers and Forsaken catapults were ambushed by the Bloodfang pack while attempting to cross Olsen's Farthing in Silverpine Forest. The ambush resulted in all those Forsaken troopers being killed and the destruction of the Forsaken catapults. Warlord Torok sent Sea Dogs to fight the Hillsbrad worgen that were swimming to the Decrepit Fields from Fenris Isle. The Sea Dogs attacked the Hillsbrad worgen but were eventaully defeated after killing many worgen.

Meanwhile, 7th Legion reinforcements from Stormwind, sneaked their way into Gilneas and aided the Gilneas Liberation Front in retaking Gilneas City. Together, the Alliance forces were able to neutralize Rutsak's Guard, Dreadwatch Outpost, and Forsaken Forward Command. The Forsaken forces eventually had to fall back to Silverpine Forest but not before recovering the corpses of Lord Godfrey and the Gilnean traitors, whom they raised to undeath as Forsaken allies. The Gilneas Liberation Front continued to harass Forsaken forces in Silverpine while the 7th Legion retook Pyrewood Village.

Druids in the Gilneas Liberation Front used their bear form in guerilla warfare against Horde forces at the Forsaken Front, which resulted in the loss of a few Horde battalions. Eventually the Horde forces learn of this tactic, and it becomes ineffective after counter-measures are implemented.

Eventaully, the tide turned. The worgen and their Alliance allies were driven back. The town of Ambermill was conquered by Forsaken forces and its inhabitants converted to Forsaken. Another town, Pyrewood Village, was burned to the ground and the Alliance's battle plans were stolen thanks to Lord Godfrey's guidance. In a final push, Alliance and Gilnean forces met the Forsaken army on the Battlefront for one final battle. The Forsaken emerged victorious as the Gilneas Liberation Front was coerced to retreat after Sylvanas kidnapped Lorna Crowley, and blackmailed Darius Crowley with threats to raise Lorna as an undead slave. The celebration was short lived though as Lord Godfrey and his allies unexpectedly betrayed the Horde and assassinated Sylvanas. When Sylvanas was brought back to life, she remains determined to get her revenge on Godfrey and the Alliance. Although the future of Gilneas remains uncertain, the Alliance invasion of Silverpine ended in failure.

Forsaken forces have since tried to invade the Hinterlands and launched an all out assault on the Highvale elves of Quel'Danil Lodge. The combined Alliance forces were able to drive back the Forsaken assault and retain their hold over Quel'Danil Lodge.

With the weakening of the Scourge after the War against the Lich King, the Alliance forces led by have claimed the western part of Andorhal, and the Forsaken forces led by  have claimed the eastern part of the city. The two factions are currently fighting each other for control of the whole city. During the Battle for Andorhal, the Forsaken, their ranks bolstered by the use of the val'kyr to raise their slain foes, push the Alliance out of the city and claim Andorhal as their own.

Following the events at Silverpine Forest, the Bloodfang pack have since been fighting a guerrilla war with the Forsaken forces at Hillsbrad. They are later found allying with the Stormpike Guard and have been amassing their forces at Purgation Isle. Due to the efforts of Kingslayer Orkus and Horde adventurers, their plans to launch an all out attack were uncovered. High Warlord Cromush asked for reinforcements from the Frostwolf Clan, but were denied by Drek'thar, who despises the Forsaken's way to make war. Cromush panics at the Frostwolf Clan's abandonment but later composes himself and sends Horde adventurers to blow up the Alliance vanguard forces before their offensive on Hillsbrad could begin.

Forsaken forces are later found establishing Galen's Fall for their impending invasion on the nation of Stromgarde. To aid them in their efforts, they have recruited the fallen prince of Stromgarde, Galen Trollbane. He aids Horde adventurers in taking the legendary sword, Trol'kalar, so that the Forsaken may use it as a weapon against the Alliance.

In the Twin Peaks near Grim Batol in the Twilight Highlands, the dwarven Wildhammer clan fight against the orcish Dragonmaw clan, having recently rejoined the Horde, battle for control of this strategic mountainous region. The Twin Peaks are crucial for staging effective offensives against the black dragonflight and the Twilight's Hammer, who currently control the Twilight Highlands. To the south, the humans of Marshtide Watch battle the Stonard orcs in the Swamp of Sorrows.

The threat from the trolls of Zul'Aman has led to the unlikely alliance between Vol'jin, Halduron Brightwing, and Vereesa Windrunner in the Ghostlands.

Kalimdor
All-out battles have erupted in the Barrens, Ashenvale, and the Stonetalon Mountains. Due to the Cataclysm the Barrens have been split into the Northern Barrens and the Southern Barrens.

The Alliance forces were able to take the outpost of Honor's Stand just before the Cataclysm in an effort expand to the Northern Barrens. Alliance forces streamed out of Northwatch and marched up the Gold Road, besieging the Crossroads as dusk fell. Then, in the heart of the night, they force-marched southward, leaving their campfires burning behind. The Alliance has since been trying to fortify themselves in Honor Stand after the Cataclysm left their defenses in disarray while also dealing with the Horde resistance in Hunter's Hill. In the Southern Barrens Alliance forces have invaded the eastern lands while the Horde has maintained control of the west. The Alliance has constructed a new military outpost to try to solidify their control of their new territory while the Horde has done the same to prevent further Alliance expansion. The central region between the two forts has become a war zone as the factions fight for control. The Alliance launched an attack on the outpost of Camp Taurajo, which ended in many civilian casualties. The destruction of Camp Taurajo has stirred the Horde and bolstered their resolve. The Horde has begun efforts to drive the Alliance back as a result. The new Horde general made an example of General Hawthorne by sending Horde adventurers to assassinate him on the streets of the Battlescar. Unbeknownst to the Horde, Hawthorne had worked to avoid civilian casualties, and his death at the hands of the Horde served to cement Alliance resolve in the region. In the initial Horde counter-attack, Gann Stonespire leads an angry mob of Horde civilians to raid the dwarven dig sites in Bael Modan. The Horde eventually causes the death of Marley Twinbraid, son of General Twinbraid. The Horde also manages to blow up the dwarven fortress known as Bael'dun Keep. General Twinbraid finds the corpse of Weezil Slipshadow in the ruins of Bael'dun Keep and thinks it must have been the goblin workers in Frazzlecraz Motherlode who were responsible for the destruction at Bael Modan. He sends Alliance adventurers to kill every goblin miner they can find and blow up the mine in Frazzlecraz Motherlode. Following General Hawthorne's death, General Twinbraid takes command of the Alliance armies in Fort Triumph.

The Alliance have since sought out new ways to expand north, using their navy to establish a presence in the Merchant Coast and attempting to reestablish themselves in Tiragarde Keep.

In Ashenvale, an enormous volcano has erupted in central Ashenvale. As the night elves struggle to deal with the chaos caused by the Cataclysm, the Horde is seizing what it perceives to be a golden opportunity. Garrosh Hellscream's forces are now bearing down upon the night elves and have overtaken several key positions that once served as Alliance strongholds. The Horde has been able to conquer more of the ancient forest and have cut down even more trees. This allowed the Horde to wrest control of Silverwind Refuge. Meanwhile Zoram'gar Outpost has its defenses improved and a new Horde camp, Hellscream's Watch, has been built overlooking the Night Elf village of Astranaar. The Horde has begun launching air raids on Astranaar from the new camp. Maestra's Post, Raynewood Retreat, and surrounding towers have also been attacked by the Horde. Despite Silverwind Refuge and other Alliance outposts being conquered by the Horde, Alliance forces continue to hold what ground they have left.

In Darkshore, the Horde have employed the Shatterspear tribe to attack the night elves of Lor'danel. Having uncovered the Shatterspear's war plans, the night elves of Lor'danel launched an offensive on the trolls and attack the Shatterspear tribe.

In the Northern Barrens, the Horde defensive post Mor'shan Rampart is under attack by the Alliance. In turn Northwatch Hold is now under attack by Horde forces.

In the Stonetalon Mountains, the Alliance enters an alliance of convenience with the Grimtotem clan of Grimtotem Post. The Alliance forces agree to supply the Grimtotem there with weapons in exchange for protection from the Horde and free reign to move freely through their territory.

Off the coast of Kalimdor, on the Lost Isles, the Bilgewater Cartel goblins were caught in the crossfire between an Alliance fleet and a Horde ship that contained an important passenger. Seeing as the Alliance would have killed all who witnessed their attack, the goblins chose to ally themselves with the stranded orcs and fought against the Alliance forces. After rescuing a captured Thrall from the Alliance and taking back control of the cartel from Trade Prince Gallywix's greedy schemes, the Bilgewater Cartel was sent to Orgrimmar and was officially inducted into the Horde. The Bilgwater Cartel has since established a new city in Azshara, Bilgewater Harbor, to replace the loss of Bilgewater Port on Kezan. In a show of good faith to their new allies, the goblins have reshaped Azshara to resemble a giant Horde symbol. They have also begun constructing a massive war fleet for Garrosh Hellscream. Yet they have also come into conflict with the naga, Blackmaw tribe furblogs, and the Alliance forces of Talrendis Point. The Horde was able to prevent a potential alliance between the Blackmaw tribe and the Alliance by framing the Alliance with an assault on their tribe. They also drove back most of the Alliance forces to Ashenvale after assassinating their commanders and destroying their ancients.

Great Sea
The war even extends to the Great Sea where naval battles are fought for control of key trade routes.