Legionary Assassin

 are high-end assassins living in the Mojave Wasteland in 2281. They work for Caesar's Legion and travel in packs. At low levels they are extremely dangerous and should be avoided at all costs, on the other hand if you can defeat them you will be able to loot powerful weapons from them that would normally not become available until much later in the game. At medium levels, they are much easier to deal with.

Background
They are assassins for Caesar. You will first find them on your way to Novac, and they will attack you if you kill the Caesar's Legionnaires at Nipton and Vulpes Inculta. The Player may encounter a squad of three legionary assassins if they are at a status of "Shunned" or worse with Caesar's Legion. This may also occur after aiding the Legion's enemies, namely the NCR, by successfully completing the quests Three-Card Bounty, I Put a Spell on You, I Don't Hurt Anymore, or any other quest that improves the reputation of the Player with the NCR. Legionary assassins can spawn anywhere in the wasteland upon the players arrival in that area and will attack any enemy force upon sight, similarly to the Regulators and Talon Company in Fallout 3.

Legionary Assassin parties can also be found attacking trading outposts or NCR garrisons like the 188 Trading Post without actively attacking the Courier (if he/she is Neutral or Ally with Caesar's Legion) unless engaged.

They are equipped with Legion Recruit Armor and Legion prime armor, carrying weapons like Machetes, 9mm SMGs and 10mm SMGs, and often the more powerful variety such as 12.7mm pistols, 12.7mm submachine guns, brush guns, trail carbines, super sledges, and Thermic lances when the player is at higher levels. They are often led by a Caesar's Legion Vexillarius equipped with Legion Vexillarius Armor, Vexillarius helmet, and a Sniper rifle

Appearances
appears in Fallout: New Vegas.

Bugs

 * Due to a large number of quest script errors, Legionary Assassins will not reappear after their initial attack, and furthermore may not initially appear at all depending on circumstances.
 * A third-party bugfix has been released which corrects this issue.
 * They may occasionally be found setting up ridiculously inadequate attempts at ambushes (such as standing in the middle of the road at Novac staring in one direction), making it easy for the player to walk up behind them and blow their heads off.