A thousand Sangheili on fallout earth

[Zor]

In this scenario some a thousand Sangheili are deposited on Fallout Earth in 2281 near New Vegas. They are armed with standard covenant energy weapons and gear (Plasma Pistols and Rifles, Carbines and Energy Swords) and are clad in standard Covenant infantry armor. These guys are post Covenant Civil War and don't consider humans to be nessisarilly their enemy (if some drugged out idiot comes out at them with a pool cue, they won't hesitate) and fifty of them have the stealth generators in their armor. Half of them are Female, all of them are soldiers. The Sangheili have a basic camp which includes places to sleep, a water purifier which can produce 20,000 liters a day and a device which allows them to recharge their energy weapons. They are led by a capable shipmaster.

What happens?

Zor

[FaxModem1]

The Courier goes on some sidequest to enlist them in the battle of New Vegas.

Without knowing where they are specifically, ifs hard to say. If they are, say, a few meters away from Vault 3, they'll easily mop up the place and maybe make it their base. However, if they're near Legion territory, they're just a new Frontline for either the NCR or the Legion to deal with. Mf. House might be interested in their tech, but might want them gone due to not fitting into his plans for New Vegas.