Hellriders

The Hellriders are the knights of Elturel, defending the land from those who would harm its people. They were first formed by the archangel Zariel, who recruited them from the faithful of Elturel to fight against the forces of hell. In the Year of the Bow, 1354 DR, Zariel, riding her golden mastodon, led them out of the city, with the cheers and good wishes of the Elturians behind them. They embarked on the Ride, a glorious mounted charge through the gate into Avernus itself. Only a small handful of the host that set out ever returned, but the gate was closed and the city saved from the fiendish hordes.
Since then the Hellriders have been rebuilt, and have been one of the most powerful military forces on the Sword Coast. They fought in the streets of Elturel itself against the armies of undead when the then High Rider of Elturel was revealed to be a vampire. Throughout their long and storied history, one constant has remained. Whenever Elturel is in danger, it is the Hellriders who will step up and defend it to the last.