The Scarlet Bastion, formerly known as the Bastion of the Silver Hand, is located in the western districts of the ruined city of Stratholme. The bastion is located in Crusaders' Square, and contains the Hall of Lights, the Hoard, and the Crimson Throne.
It was formerly the barracks of the Knights of the Silver Hand, and housed countless of their treasures. Some time after the Scourge took control of Stratholme, the bastion was under the control of the Scarlet Crusade and its Crimson Legion. Balnazzar, disguised as Saidan Dathrohan made his stand there. After the Cataclysm, Balnazzar shed is human disguise and killed every member of the crusade and raised them as a undead forming the group Risen.
In the RPG
The Scarlet Bastion serves as a small outpost in the undead-infested city of Stratholme. Grand Crusader Dathrohan struggles to hold the Scarlet Crusade stronghold. He coordinates the fight for control of the ravaged city. It is manned by members of the Crimson Legion, the elite guard of the Crusade. It is the Scarlet Crusade's holiest site. The Scarlet Bastion is where the Scarlet Crusade first formed, and where the founding members took their oaths.