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The NCR-Legion War is an ongoing military conflict in 2281 between the New California Republic and Caesar's Legion.


As the NCR started to expand into the Mojave Wasteland, Caesar decided to add the NCR as another notch to the Legion's belt and conquer the area for himself.



In 2277, the Legion entered the Mojave to take the area. To their surprise, the NCR had already taken a hold of the area seven years earlier. Angry at the invasion of the area by the "profligates'", Caesar readied the Legion to destroy the NCR and conquer the Mojave.

Destruction of Hopeville and Ashton

Shortly before the First Battle of Hoover Dam in 2277, Caesar's Legion committed a significant force to capture the independent towns of Ashton and Hopeville in New California, recognizing that the area was a major supply line for the NCR's efforts. The NCR contested the Legion's control, being in the process of annexing the area themselves, and a confrontation ensued.[2] The result was the siege of Hopeville and Ashton. The NCR and Legion forces at the siege were very well-equipped,[3] with a disproportionate number of special forces present.[4]

While this was occurring, the Courier carried a package from Navarro by order of the NCR, with neither the Courier nor the NCR government being aware of the package's nature. The package actually contained a detonator. When this device was close enough, it remote linked with the ICBM computers, sending a signal to the dormant nuclear missiles lying in the silos beneath the ground. They then began detonating one after another, splitting the earth, cracking and twisting the landscape, causing massive earthquakes. The disaster created the newly named Divide: a wind-beaten maze of twisting canyons, skin-flaying dust storms and horrific abominations.

The detonation had huge effects on the war in the Mojave. Firstly, both the NCR and the Legion suffered horrific casualties, with entire companies of NCR soldiers being killed outright, Legion deaths being of a presumably similar scale, and the many survivors being transformed into Marked men. Secondly, and more importantly, the Divide was rendered impassable, greatly hindering the NCR's logistics. They were not able to properly capitalize on their victory at Hoover Dam, with the former Malpais Legate Joshua Graham crediting this event with the Legion being able to survive past the battle.[5]

First Battle of Hoover Dam

Establishing their main Mojave base at Fortification Hill, Caesar ordered the Malpais Legate to storm Hoover Dam in a battle that would be known as the First Battle of Hoover Dam. The NCR fended off the attack well, managing to both successfully prevent Hoover Dam from getting overrun by Legion troops and trap the Legion in the middle of the dam, at the same time. Taking advantage of the situation, NCR sharpshooters targeted the officers and battle-hardened veterans from afar, sowing chaos and confusion amongst the trapped and already-disoriented Legion. In an attempt to salvage the deteriorating situation, the Legion's elite forces were ordered to pursue the Republic sharpshooters, charging blindly into Boulder City after them. When the Legion's elite forces stormed the city they were unaware that the NCR had rigged explosives and C4 across the entire town. When the NCR detonated the explosives it wiped out the vast majority of the Legion's elite forces. The NCR then mopped up what was left of the attacking forces, taking only 107 losses themselves.

Caesar was furious at the Malpais Legate's' humiliating defeat at the Dam. At the Grand Canyon, he ordered his men to cover the Malpais Legate with pitch, burn him alive, and toss his flaming body into the canyon. He then bestowed the rank of Legatus on Lanius.

Willow Beach and Arizona Spillway

Despite their major setback, the Legion found some success in conducting smaller operations against the NCR in the following years. In 2281, they opened the radioactive waste containers from San Onofre in the firehouse within Camp Searchlight,[6] and established the Cottonwood Cove outpost, and raiding bases such as Ranger Station Charlie, and the towns of Nipton and Nelson. They also sent spies into the New Vegas Strip. They secretly plotted their second assault on the Dam at Fortification Hill. As they had finally rebuilt their strength, Caesar ordered his forces to expel the NCR from the east side of the river in what would be known as the Battle of Willow Beach, Battle of Arizona Spillway and the Battle of Nelson. All three of these battles would prove to be victorious for the Legion.[Non-game 1]

After these events, the tactical situation with the NCR is tenous, due to their various enemies such as the Great Khans and the Powder Gangers. Despite this, they hold various strongholds in New Vegas and the Mojave Outpost.

Aside from their main base at Fortification Hill, the Legion currently have control of Cottonwood Cove, Camp Nelson, the Techatticup Mine, Legate Lanius' camp, the Legion Raid Camp, and Nipton. The area around Camp Forlorn Hope is also heavy with Legion activity.

Legion Authority

When the Courier entered the Lucky 38, it gained either Vulpes Inculta or Alerio's attention. He informed Caesar, who then asked him to extend an invitation to the Courier. When the Courier arrived, Caesar ordered them to enter the underground bunker and destroy it, and execute Robert House. If the Courier accepts this, they will be asked to receive alliances from factions such as the Boomers and the White Glove Society.

NCR Authority

Ambassador Crocker noted the Courier's entry into the Lucky 38. He invites them over and asks them to work for him. When the Courier arrived, Crocker asked them to receive alliances from the Boomers and ease the tension between NCR and the Kings. It is unknown if the alliance missions were successful. Colonel Moore asks the Courier to gain the support of the Great Khans or destroy them, then destroy the Brotherhood of Steel, but a truce can be signed as well (player choice). They then required assistance protecting Kimball during the visit (player character choice).


The Mojave Campaign ends with the Second Battle of Hoover Dam, and the outcome of said campaign ultimately depends on the side championed by the Courier. If NCR is supported, it secures Hoover Dam, all major Mojave territories (including the Strip and Freeside), and Fortification Hill. If Caesar's Legion is supported, it conquers Hoover Dam and the entire Mojave region up to the Mojave Outpost. Legate Lanius will express desire to go on to conquer California, wiping out the NCR entirely.

Alternatively, the war is brought to an abrupt halt if the Courier either supports Mr. House or works with Yes Man to take over the Mojave for themself. The NCR initially defeats Caesar's Legion at Hoover Dam while Mr. House's Securitron army destroys Fortification Hill. After this, the Securitron army ejects all NCR military presence from the region, the violence of this forced withdrawal depending on the Courier's negotiation with General Oliver. Now physically separated from each other by the established Free Economic Zone of New Vegas, and the Legion on the way to collapse due to the death of Caesar, who was at Fortification Hill at the time, the four-year conflict is abruptly ended.

Caesar's Legion

Narrated by Ron Perlman

# Slide Voice-over narration In-game condition
Legion end slide 01.png
Caesar entered The Strip as though it was his Triumph. The Legion pushed the NCR out of New Vegas entirely, driving them back to the Mojave Outpost. The Legion occupied all major locations, enslaving much of the population and peacefully lording over the rest. Under the Legion's banner, civilization - unforgiving as it was - finally came to the Mojave Wasteland. Do not allow Caesar to die in Et Tumor, Brute?, complete the endgame quest Veni, Vidi, Vici for Caesar's Legion.
Legion end slide 02.png
The Legate is crowned as the new Caesar. He entered The Strip as though it was a military target, destroying anyone who resisted him. The Legion brutally occupied all major locations, killing and enslaving a large amount of the population. Under the Legion's banner, civilization - savage as it was - finally came to the Mojave Wasteland. Allow Caesar to die in Et Tumor, Brute?, complete the endgame quest Veni, Vidi, Vici for Caesar's Legion.

New California Republic

Narrated by Ron Perlman

# Slide Voice-over narration In-game condition
NCR end slide 01.png
The New California Republic celebrated its second victory at Hoover Dam, establishing definitive control over the entire Mojave Wasteland. Soon after, they negotiated terms to annex The Strip, Freeside, and many surrounding communities. The Mojave Wasteland, at long last, had entirely fallen under the NCR's banner. Complete the endgame quest Eureka! for the NCR.


Narrated by Ron Perlman

# Slide Voice-over narration In-game condition
House end slide 01.png
The Courier, with the aid of Yes Man, drove both the Legion and the NCR from Hoover Dam, securing New Vegas' independence from both factions. With Mr. House out of the picture, the remaining Securitrons on The Strip were hard-pressed to keep order. Anarchy ruled the streets. When the fires died, New Vegas remained, assuming its position as an independent power in the Mojave. Complete Wild Card: You and What Army? for an independent New Vegas without upgrading the Securitrons.
House end slide 01.png
The Courier, with the aid of Yes Man, drove both the Legion and the NCR from Hoover Dam, securing New Vegas' independence from both factions. With Mr. House out of the picture, part of the Securitron army was diverted to The Strip to keep order. Any chaos on the streets was ended, quickly. Chaos became uncertainty, then acceptance, with minimal loss of life. New Vegas assumed its position as an independent power in the Mojave. Complete Wild Card: You and What Army? for an independent New Vegas with the upgraded Securitrons.

Mr. House

Narrated by Ron Perlman

# Slide Voice-over narration In-game condition
House end slide 01.png
Mr. House's Securitron army took control of Hoover Dam and The Strip, pushing both the Legion and the exhausted NCR out of New Vegas. Mr. House continued to run New Vegas his way, a despotic vision of pre-War glory. The streets were orderly, efficient, cold. New Vegas continued to be the sole place in the wasteland where fortunes were won and lost in the blink of an eye. Complete The House Always Wins for Mr. House.


Being the most rigorous war to have ever occurred in post-apocalyptic America, various battles have happened between the NCR and the Legion. Several full-scale battles have been recorded of happening between the NCR and the Legion, with the Legion having the advantage for most of the smaller battles, with the NCR having one large victory to its name.


  1. The Courier: "What will you do if I don't turn you in?"
    Hanlon: "Oliver can't stand that rangers got credit for victory at Hoover. Whatever I recommend, he does the opposite. I said I wanted them on the ridge. He put them right on the western part of the dam itself. We don't have enough firepower to hold that spot. If the troopers fall back, and they will, the rangers will advance to cover Oliver's retreat. We lose the dam, Oliver and the senate are ruined."
    The Courier: "That's crazy."
    Hanlon: "Maybe fifty rangers will die on that dam. We lose over a thousand troopers every year. Being here is crazy. Getting out's the only sane thing to do."
    (Hanlon's dialogue)
  2. The Courier: "On the High Road, you mentioned NCR and Legion fought here... before and after the Divide?"
    Ulysses: "The two-headed Bear made its claim, dug its claws into the trail you made. For once, it seemed like it might succeed - cut a route to the Mojave. Couldn't let NCR stay in the Divide. Trade route, road the military could use... can't have two roads into the Mojave. Not after the work we'd done to cut off New Canaan, other routes, killing caravans... all we'd done to make the West bleed."
    (Ulysses' dialogue)
  3. Marked men equipment in-game.
  4. The Courier: "[NCR] Those bodies in the silo were NCR soldiers... some special forces."
    Ulysses: "Might have been. Once. To the Divide they came... in the Divide, they rest."
    (Ulysses' dialogue)
  5. The Courier: "I'm guessing you don't like Caesar very much."
    Joshua Graham: "Love the sinner, hate the sin. With Caesar, it's often very difficult to see through all of that sin to the person inside. I can say that we were both lucky that NCR's supply lines and land routes north of Mojave Outpost were destroyed before the Battle of Hoover Dam. Something bad happened near Death Valley, at a place called the Divide. NCR couldn't cut across anymore and it slowed down their reinforcements. Terrible storms ripped entire companies apart before they even got to Nevada soil. The aftermath of Hoover Dam could have been even worse for Caesar."
    (Joshua Graham's dialogue)
  6. Camp Searchlight terminal entries; NCR communications terminal, Communications Entry #937
  1. Fallout: New Vegas Official Game Guide Collector's Edition p.372-376: "[3.33] Hoover Dam
    All of the Main Quest in Act III centers around this location, as do the Main Quests involving the visit of President Aaron Kimball. A stronghold of extreme strategic importance for centuries, this location has seen recent turmoil between major Faction too. A few years before current events, Caesar's Legion rolled in, led by ex-Mormon missionary Joshua Graham, Caesar's Legate. Not considering NCR's army to be a serious threat, Graham exercised somewhat lax control over the Legion. During the Battle of Hoover Dam, NCR Rangers and Sharpshooters from First Recon employed risky tactics against the Legion with the help of the enlisted Troopers, and despite horrific loss of life, Caesar's forces were pushed back, but not routed.
    The NCR has been holding the dam continuously since, and have fortified positions along the dam and up and down the west side of the Colorado River. Recently, the Legion pushed the NCR off of the east side of the river at the Battle of Willow Beach (which destroyed an NCR military camp) and the Battle of Arizona Spillway. Day to day military operations at the dam are under the command of Colonel Moore. While troopers are active here, there are also a large number of civilian contractors who are trying to keep the dam running. They are of a secondary concern to Moore, who is preparing from for an impending attack by Caesar and a visit by President Kimball."
    (Fallout: New Vegas Official Game Guide Collector's Edition Tour of the Mojave Wasteland)