Wikia

The Champions' Hall is the officer's barracks for the Alliance in Stormwind. It is located in the south of the Old Town. With the addition of the new honor system in patch 2.0.1 all characters could enter the (world-instanced) hall; in the old system you had to attain a rank of Knight (Rank 6). As of patch 3.0.2, the Champions' Hall is no longer instanced and is now simply a part of Stormwind city.

Inside the Hall are vendors who sell PvP reward gear for members of the Alliance. The Horde counterpart of the Champion's Hall is the Hall of Legends in Orgrimmar.

Inhabitants

Merchants

Lieutenant Karter <War Mount Quartermaster>
Officer Areyn <Accessories Quartermaster>
Sergeant Major Clate <Legacy Armor Quartermaster>
Lieutenant Jackspring <Legacy Weapon Quartermaster>
Master Sergeant Biggins <Accessories Quartermaster>
Knight-Lieutenant T'Maire Sydes <Honor Quartermaster>
Captain Dirgehammer <Conquest Quartermaster>
Edlan Halsing <Honor Trade Goods>
Lieutenant Tristia <Glorious Conquest Quartermaster>
Liliana Emberfrost <Honor Heirlooms>

NPCs

MIA

Lieutenant Rachel Vaccar <Outland Armor Quartermaster>

Removed NPCs

Captain O'Neal <Jewelcrafting Quartermaster>

In the middle several Alliance generals can be found standing around a large map of Azeroth: Archmage Gaiman from Stormwind, Sergeant Major Skyshadow from Darnassus, and the draenei Harbinger Ennarth. Lieutenant Rachel Vaccar is missing from the game since the release of Cataclysm, and this is a known issue that should be resolved in a future patch ^[1]

Trivia

Several of the humans within the "Champions' Hall" in the Stormwind city barracks are named after the major characters from the Stargate series.
Prior to The Burning Crusade Lieutenant Rachel Vaccar was at the table in the back of the room. After TBC release she moved to the front of the room & became the <Outland Armor Quartermaster>
During the Zombie Infestation, it seems a zombie could open or close the door to the hall at will. Players would be trapped inside, unless someone outside or inside became a zombie and reopened the door. In some cases, no one knew what to do, and so the door stayed closed indefinitely. This glitch was never fixed, but the event ended.

Patch changes

/ Patch 3.0.2 (14-Oct-2008): The Champion's Hall is no longer instanced, and the door cannot be shut.
Patch 1.7.0 (13-Sep-2005): The Champion's Hall has a new load screen.
Patch 1.4.0 (2005-05-05): Added.