7th Legion

The 7th Legion is an elite special ops regiment composed of Alliance veterans. They have been present behind the scenes for almost every major offensive and military engagement the Alliance has ever done. They fulfill a similar role to their Horde counterpart, the Kor'kron Guard, both groups being considered elite forces and having been heavily involved in their faction's campaigns, notably in Northrend, Pandaria, and during the Fourth War.

Background
So far, the 7th Legion has been known to participate in the Battle of Mount Hyjal and in battles against the Burning Legion.

World of Warcraft
During the Ahn'Qiraj War, the 7th Legion was part of the Might of Kalimdor in Silithus.

Dragonblight
The 7th Legion have joined forces with Highlord Bolvar Fordragon's forces and have been running special operations against the Scourge in order for the Alliance to secure a foothold in the Dragonblight. Former Might of Kalimdor members, , and survived to fight once again in Northrend. They were stationed at Wintergarde Keep, where they fought against the undead legions of Naxxramas. Death knights of Ebon Blade joined the 7th Legion.

Isle of Conquest
Halford Wyrmbane led the 7th Legion on the Isle of Conquest, where they fought Kor'kron warriors under the command of Overlord Agmar.

Icecrown Citadel
While the forces of the Ashen Verdict fought through Icecrown Citadel, the 7th Legion and the Kor'kron engaged in an aerial battle outside (using The Skybreaker and Orgrim's Hammer, respectively).

Cataclysm
Halford Wyrmbane led the 7th Legion to the Ruins of Gilneas, where they helped the Gilneas Liberation Front against the Forsaken invaders.

While unofficial, the soldiers at Victor's Point appear to be 7th Legion soldiers.

Tides of War
A majority of the 7th Legion naval fleet, under the command of Horran Redmane, was decimated in the defense of Theramore Isle.

Mists of Pandaria
It has been revealed that in Patch 5.1.0, the 7th Legion Fleet has arrived on the shores of the Krasarang Wilds, and is the main Alliance force in the battlezone that will erupt. So far, none of the original 7th Legion leadership are known to be involved.

The fleet of the 7th Legion notably attacked Domination Point alongside soldiers of Lion's Landing.

They also participated in the Assault on Zan'vess.

Legion
Several units of the 7th Legion were seen preparing for the battle for the Broken Shore in Stormwind Harbor.

The 7th Legion were also deployed along with the Skyfire and King Genn Greymane's forces to escort Alliance champions to Stormheim and unofficially, to intercept Sylvanas Windrunner's fleet. After engaging the fleet, the Skyfire was sabotaged by Forsaken boarders and crashes on Stormheim. The 7th Legion stayed at the front of the ship to fight off storm drakes while the crew evacuated. An Alliance adventurer rescued the missing Legionnaires from storm drakes and brought them back to the Skyfire Triage Camp.

Following this, they became a recruit-able option for the Valarjar after the freeing of Lord Darius Crowley.

Several units were seen aboard Wind's Redemption when it sailed from Stormwind City to Azuremyst Isle.

Battle for Azeroth
Members of the 7th Legion guarded the Stormwind Stockades which contained Princess Talanji and Prophet Zul of the Zandalari Empire, as well as Varok Saurfang of the Horde captured during the Siege of Lordaeron. The Stockades were infiltrated by a Horde group in order to free the Zandalari trolls. The guards, along with Mage-Commander Lyra, were all killed.

On King Anduin Wrynn's orders, the 7th Legion traveled to Kul Tiras with Genn Greymane to ensure that Jaina Proudmoore's mission of getting the Kul Tirans to rejoin the Alliance succeeded. They can be found aboard the Wind's Redemption docked at Boralus, where under Wyrmbane's command they work to secure the Alliance's position on Kul Tiras and Zandalar.

The 7th Legion can also be found on the Sword of Dawn; they participate in the Battle for Stromgarde.

The 7th Legion was stationed near Shadowfang Keep where Chief Plaguebringer Harris developed a new bio-weapon. It was unleashed on them while Horde champions encountered Captain Tobias Zaren.

During the Faction Assaults, some members of the 7th Legion were present among the Purified, an Alliance contingent of human, draenei, dwarf, and Lightforged soldiers empowered by the Light who protect the people of Drustvar.

Notes and trivia

 * The 7th Legion is equipped with the best technology the Alliance can provide, and they are often seen using submarines, guns and ground support weapons such as chain guns and harpoon guns.
 * In Heroes of the Storm, one of the skins for Valeera Sanguinar is "".