"Defiance Has Fallen" is a pivotal quest in Fallout 76 that introduces players to the Brotherhood of Steel faction in Appalachia. This quest is crucial for understanding the fate of the Brotherhood and sets the stage for further involvement with this faction. Here's a comprehensive guide on how to complete "Defiance Has Fallen" and what to expect along the way.

Introduction to the Quest
To begin "Defiance Has Fallen," players must first visit Abbie's Bunker, located in the North-East corner of the Mire region. Inside the bunker, access Abbie's Terminal and read the entry titled "Fort Defiance." This will initiate the quest and start your journey to uncover what happened to the Brotherhood in Appalachia.
Objectives and Walkthrough
1. Find the Location of Fort Defiance
Travel to Camp Venture: This camp is the key to finding Fort Defiance. It is typically infested with Scorched enemies, so be prepared for combat.
Clear the Camp: Fight through the Scorched and explore the barracks for junk and notes that provide insight into the camp's final days.
Unlock the Command Center: Hack the locked terminal in the west corner of the camp to access the offices. Inside, you'll find an ammo crate, possible crafting plans, and an Overseer's Cache.
Discover the Location of Fort Defiance: On a table in the center of the room, access the Brotherhood of Steel Commander's Terminal. Next to it, read the "Letter to Tommy" note, which reveals that Fort Defiance is located in the Allegheny Asylum.
In Fallout 76, completing quests like "Defiance Has Fallen" allows players to earn valuable rewards, including Fallout 76 Caps, which are essential for trading and enhancing equipment. While completing this quest doesn't directly award caps, the experience and items gained can eventually lead to acquiring more caps through trading or selling unwanted loot with other players in the game. This sets the stage for deeper involvement with the Brotherhood of Steel and further exploration of Appalachia's vast landscape.
2. Travel to Fort Defiance
Head to Allegheny Asylum: Located on the border between the Savage Divide and Cranberry Bog regions, this asylum serves as the Brotherhood's headquarters.
Explore the Asylum: Enter the asylum and notice the open door and bulletin board. Behind you, there will be an elevator locked behind a laser grid, accessible only to Brotherhood members.
Complete the Quest: Interact with the "Final Stand" note on the bulletin board to complete "Defiance Has Fallen" and begin your journey to join the Brotherhood.
Rewards and Next Steps
Upon completing "Defiance Has Fallen," you will receive several rewards, including:
Photo Frame: The Brotherhood!
Brotherhood Fatigues
Short Gatling Gun
5mm Rounds x140
Plan: Protective Lining BoS Underarmor
Radaway x6
To proceed with the Brotherhood questline, you must complete the "Back to Basic" side mission at Camp McClintock if you haven't already. Afterward, you can move on to the next Brotherhood quest, "Recruitment Blues".
"Defiance Has Fallen" is a foundational quest for understanding the Brotherhood of Steel's presence in Appalachia. It sets the stage for further exploration of the Brotherhood's story and offers a glimpse into their struggles and ultimate fate. Completing this quest is essential for those interested in joining the Brotherhood and progressing through their storyline in Fallout 76.