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They'd be marginally more effective. We lost most of the chapter defending glorified artillery.Veronica

Operation: Sunburst[Non-game 1] was a decisive strike on the Mojave chapter of the Brotherhood of Steel by the New California Republic over the control of the pre-War, Poseidon Energy solar plant HELIOS One during the Brotherhood War in 2276.[2]


The occupation of HELIOS One was a decision made by Elder Elijah, who intended to unlock the secrets of the power plant.[5] The Mojave chapter operated freely within the Vegas wastes for several years, carrying out many reclamation missions without serious opposition.[Non-game 1] In 2274, a large contingent of NCR troops entered the region and occupied Hoover Dam, coming into conflict with the chapter.[2][Non-game 2] Elder Elijah concentrated on bringing HELIOS into operation while the Brotherhood contingent engaged in skirmishes with the NCR for nearly two years.[5][Non-game 1]


The Brotherhood knew that solar plant was not defensible and that the NCR was moving in, but Elder Elijah's decided to remain, dooming the chapter.[6][7] The NCR began "Operation: Sunburst," the offensive to drive the Brotherhood out and take control of the facility.[Non-game 1][8] Troopers attacked the Brotherhood in waves, concentrating a force that outnumbered the defenses by a factor of between 15[9] and 20 to 1,[3] Then-Senior Paladin Hardin recommended fighting a retreating action, but Elder Elijah ordered the troops to dig in and protect the facility, reporting to Hardin that he almost "had it working" but never clarified beyond.[6][10] With a limited fighting force, the Brotherhood's defenses fell, the perimeter was overrun, Elder Elijah disappeared.[6][7]


The Brotherhood was routed, losing significant numbers including over a half of its knights and paladins.[4] McNamara assumed command and led survivors in a retreat eastward towards Hidden Valley. Instead of pursuing, NCR forces regrouped and secured the power plant. When they finally set out to locate and destroy remaining Brotherhood forces, they were nowhere to be found.[11][3]

Once the Brotherhood survivors reached Hidden Valley, a strict lockdown was enacted.[12][7] Activity outside the bunker was drastically restricted, allowing only supply runs, occasional reconnaissance missions, and night patrols were allowed to leave the underground installation and even then, only at night.[Non-game 1] The lockdown persisted into 2281 in response to the NCR increasing its presence in the Mojave fivefold, while the Brotherhood subsequently failed to recover its own strength.[13][Non-game 1]

For abandoning his chapter during Operation: Sunburst and going rogue, Elder Elijah was marked for execution by the Circle of Steel.[14]


Operation: Sunburst is mentioned only in Fallout: New Vegas, its name listed in the game guide.[Non-game 1]


  1. Hidden Valley bunker terminal entries; Linda Schuler's terminal, Journal Entry 260
    Schuler has kept a weekly log since entering the Hidden Valley bunker and with 261 total entries and the latest entries being in the start month of Fallout: New Vegas. 261/52.1429 = 5.01 years exactly puts Operation: Sunburst occurring in October.
  2. 2.0 2.1 2.2 The Courier: "I'd like to know more about the NCR."
    Dennis Crocker: "I can provide a quick history lesson, if that's what you're looking for. In 2274, President Kimball sent the NCR army into the Mojave in force, with the objective of occupying and repairing Hoover Dam. Rangers and army scouts had confirmed that the dam was basically unoccupied and could be restored to an operable condition. Upon arriving at the dam, however, they discovered that a large force of tribals and robots had occupied it. This was our introduction to the Three Families, the Securitrons, and, of course, Mr. House. Using his Securitrons as intermediaries, Mr. House called for parlay. He claimed his forces had occupied Hoover Dam in order to safeguard it for our arrival. And that he was ready to turn it over to us, so long as we could agree to terms. Those terms became the Treaty of New Vegas."
    (Dennis Crocker's dialogue)
  3. 3.0 3.1 3.2 3.3 The Courier: "Why was the Brotherhood of Steel here?"
    Haggerty: "Damned if I know. Put up a hell of a fight, though. We had them outnumbered, I don't know, twenty to one, maybe. They held out as long as they could. Lost most of their force before they retreated. Gave us a little parting gift, too. They had some of the plant running, but they shut it all down. Enabled an old security system, too, to keep us away from the controls. Jerkoffs."
    (Haggerty's dialogue)
  4. 4.0 4.1 Nolan McNamara: "Veronica. I hope-"
    Veronica: "I brought you a present. We unlocked the secret of HELIOS One."
    Nolan McNamara: "What? Wonderful news!"
    Veronica: "No. It's not. ARCHIMEDES II is an orbital laser. Effective only outdoors in a limited radius and requiring a long recharge."
    Nolan McNamara: "In the hands of the enemy-"
    Veronica: "They'd be marginally more effective. We lost most of the chapter defending glorified artillery."
    (Veronica and Nolan McNamara's dialogue)
  5. 5.0 5.1 The Courier: "Yes, what is the task?"
    Edgar Hardin: "Back when we were stationed at HELIOS, our scouts reported that a group was establishing itself in the area as a distributor of Pre-War weapons. Our Elder at the time, Elijah, was too concerned with getting HELIOS running and fending off the NCR, so he ordered us to leave them alone. It's time that we correct that oversight, and show this region that the Brotherhood is still a force to be reckoned with. I want you to visit these weapons dealers, this Van Graff family, and make an example of them. Leave no one alive. When the job is done, report back and I'll arrange for a team to clean up the site and retrieve the weapons."
    (Edgar Hardin's dialogue)
  6. 6.0 6.1 6.2 The Courier: "Tell me about your last Elder."
    Edgar Hardin: "Elijah was a strange one. His even becoming Elder was highly questionable, seeing as how he was a Scribe. Typically, only Paladins are eligible. But an exception was made in his case, on account of him being a genius. Unfortunately, whatever scientific acumen he had didn't extend to tactics. Trying to defend HELIOS was a blunder of the worst kind, and many brothers lost their lives because of it. Many of the senior paladins, myself included, advised him to fight a retreating action, but he refused to budge. Said he almost "had it working". We never did find out exactly what he was talking about. When the perimeter was finally overrun, the Elder had simply vanished."
    (Edgar Hardin's dialogue)
  7. 7.0 7.1 7.2 The Courier: "Tell me about what happened at HELIOS."
    Ramos: "I'm sure someone's told you all this before. Several years back, we were running our chapter out the HELIOS One solar power station. Our Elder at the time, Elijah, had some kind of obsession with the place. Which is the only reason we stayed as long as we did. That place was hardly defensible, and we knew the NCR was moving in on us, but the Elder refused to budge, insisting that he just needed "more time". We never found out what he needed the time for. Wave upon wave of NCR troopers hit us from all directions. We held out for a time, but we were grossly outnumbered, and they had more men than we had ammo. Eventually our positions collapsed. Elder Elijah was nowhere to be found, so McNamara took charge and led what remained of us on a counter-offensive west. We lost a lot of men and women, but we broke through and made it here. Make no mistake, McNamara saved this chapter that day."
    (Ramos' dialogue)
  8. The Courier: "Shouldn't there be more people than this defending a power plant?"
    Haggerty: "There should. But we're not getting much power out of it so none of our enemies have a big interest in it either. Not like Hoover Dam, anyway. We had a real fighting force here just long enough to take it from the Brotherhood of Steel. Then they got sent east to the dam like everybody else. Caesar's Legion sends skirmishers every so often. Prodding for weaknesses, mostly. The reality is, if they really wanted it, we'd all be dead."
    (Haggerty's dialogue)
  9. The Courier: "Why do you hate the Brotherhood so much?"
    Robert House: "Because they're ridiculous! Because they galavant around the Mojave pretending to be Knights of Yore. Or did, until the NCR showed them that ideological purity and shiny power armor don't count for much when you're outnumbered 15:1. The world has no use for emotionally unstable techno-fetishists. Just wipe them out, will you?"
    (Robert House's dialogue)
  10. Hidden Valley bunker terminal entries; Linda Schuler's terminal, Journal Entry 01
  11. The Courier: "I thought the Brotherhood were all wiped out at HELIOS One. How could they have survived?"
    Cassandra Moore: "After the battle, we consolidated our hold on the plant before pursuing our enemies. It was a mistake, to be sure, but there wasn't really any place for them to go. When we finally gave chase, however, they had simply vanished. Some of our people think they had some means of conveyance, like the vertibirds the Enclave used, and hightailed it out of here. I think that they found someplace to hide close to HELIOS, and never went that far at all. Any other questions?"
    (Cassandra Moore's dialogue)
  12. The Courier: "Mr. House won't be a problem. He's been disconnected from his system."
    Cassandra Moore: "But he's still alive? I'll have to remember to send someone to follow up on that later. Anyway, at least he's out of the picture for the time being. You might be happy to know that your efforts haven't gone unnoticed, either. The brass have been throwing around the idea of having the president visit the dam for a while now. To rally the troops and boost morale and such. With our recent achievements, they finally feel secure enough to stage the damn thing. But while it's being planned, I have one last mission for you. Several years ago, we managed to wrest the HELIOS One solar power station from the Brotherhood of Steel chapter local to this area. It was a crushing victory, but no one's heard a peep from the Brotherhood since. Most people assume the Brotherhood is scattered and not a threat. Recently we've had scouts go missing in an area west of HELIOS, and I'm concerned that the Brotherhood is involved. I want you to find them, and once you do, finish them for good. Any questions?"
    (Cassandra Moore's dialogue)
  13. The Courier: "Tell me about the lockdown."
    Nolan McNamara: "It's a protective measure that was enacted after our defeat at HELIOS. The NCR was hot on our heels, and we wouldn't have survived another encounter. It was decided that we would stay quiet for a time, heal the wounded, and try to come up with a new strategy. However, after we had fully recuperated, our first scouting measures showed that the NCR's presence in this region had only increased in our absence. There are now more than five times the number of NCR troops in the area as when we fought them, and we have half the number we did at HELIOS. And so the lockdown has been extended. To go outside would be the death of us all."
    (Nolan McNamara's dialogue)
  14. Patient log: Y-17


Stroken BoS Emblem.png

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