Bethesda Softworks and Bethesda Game Studios have announced the next post-launch expansion for Fallout 76, and it’s focused entirely on the iconic Brotherhood of Steel.

The sixth content expansion, Steel Dawn, is bringing the series’ mainstay Brotherhood of Steel, marking their arrival in the Appalachia region. A release window is set for sometime in December.

Today is also the day in the Fallout timeline when the bombs historically fell, wiping out the majority of the human race. To celebrate this day, Bethesda has put together a week of events that includes free access to Fallout 76.

Here’s a new trailer:

Here’s a brief rundown on the expansion:

AD VICTORIAM!

Steel Dawn is the first chapter in the new Brotherhood of Steel questline, free for Fallout 76 players. Paladin Leila Rahmani and her troops have arrived from California to establish a new Appalachian chapter. Work with or against the other Factions to achieve success. Visit settlements populated with new NPCs and unlock powerful weapons and armor from the Brotherhood arsenal. Join in their mission to rebuild society and aid in securing valuable technology – but only you can determine how it will be used.

Fallout 76 is now available for Windows PC (via Bethesda, and Steam), PlayStation 4, and Xbox One. In case you missed it, you can find our review for the game here.