“The American people are worth fighting for. The future must be secured. I won't let you stand in the way of that... Once you're dead, we'll finish off this pathetic Brotherhood and become the true saviors of the Wasteland.”
Autumn was raised on the Enclave Oil Rig.[Non-canon 1] His father was a high-ranking Enclave scientist who received orders from the president to relocate all high-ranking officials to Raven Rock, the only secure Enclave location with a functioning ZAX super-computer.[Non-canon 1]
Colonel Autumn expresses his belief that the Enclave is the legitimate continuation of the United States government. He is dedicated to preserving the initiatives of the government, referring to those who oppose him as traitors. He warns the people living in the Capital Wasteland not to interfere with the Enclave's mission, or risk harsh consequences. The colonel's ideas for how best to solidify power in the region puts him at odds with President Eden, resulting in Autumn circumventing the president's orders.
Interactions with the player character
This character is essential. Essential characters cannot be killed.
The Waters of Life: Colonel Autumn is first encountered by the Lone Wanderer during the quest, The Waters of Life, locked in the Project Purity control room at the Jefferson Memorial with James and Janice Kaplinski. He declares the Enclave's intention to confiscate the project, and, in a show of his deadly seriousness, kills Janice in order to force James' cooperation. James, instead of shutting down the project, floods the area with radiation from the purifier, in an attempt to kill Autumn and his men. James and the Enclave soldiers fall to the radiation and die, while Autumn survives.
Finding the Garden of Eden: Colonel Autumn is seen again at the end of "Finding the Garden of Eden". He kneels over the Lone Wanderer before the blackout, the latter having been knocked to the floor and stunned by an Enclave pulse-grenade. He orders his troops to secure the G.E.C.K. the Lone Wanderer was carrying.
The American Dream: At Raven Rock, Autumn interrogates the Lone Wanderer, demanding the activation code for the purifier. The code [2-1-6] can be given up (in which case the Colonel will execute the Lone Wanderer with his pistol), lied about, or instead, the Lone Wanderer can insult him. In the case of the latter two, Autumn will be interrupted by Eden, who will release the Lone Wanderer. Colonel Autumn later comes on the Raven Rock broadcast system, informing all Enclave troops that the Wanderer is a hostile target and to disregard the President's orders. He then escapes with a group of Vertibirds.
Take it Back!: Autumn is finally confronted by the Lone Wanderer at the end of Take it Back!, just outside the purifier's control room once more. He is accompanied by his two personal bodyguards, a pair of high-level Enclave soldiers equipped with tesla power armor and armed with Gatling lasers or miniguns. Autumn and his men can either be fought or convinced to leave peacefully through two consecutive Speech checks of fairly high difficulty. One speech path involves convincing Autumn to abandon President Eden's insane plans and stop the war; if Raven Rock has been destroyed, another slightly easier Speech path is available in which Autumn can be convinced he has nothing left to fight for and walk away.
During the optional final fight with Autumn, if one of his bodyguards dies, he may pick up their minigun or Gatling laser.
After completing The Waters of Life, Colonel Autumn can be heard on the Enclave Radio informing the people of the Capital Wasteland of the Enclave's mission and warns not to interfere with them.
When faced during the final fight his body may fall down the gap underneath the purifier's control room, making his body unreachable and un-lootable.
During The Waters of Life quest he may exit the purifier before the door closes, leading to him performing the dialogue looking over his shoulder and being unable to kill Janice, just walking towards the door. This glitch can be solved either by reloading or exiting then entering the room. The latter will cause Autumn to have killed Janice but still be outside the purifier. He will still "die" as normal and can be looted. He cannot be attacked or talked to during this, though an empty dialogue will show up for a short time.
↑Autumn: "When you see the Enclave, you see the United States government. We are authorized to restore order and civility, by any means necessary." (Colonel Autumn's dialogue)
↑Autumn: "You again. I can't say I'm surprised. You and your ilk seem hell-bent on destroying everything our government has worked to achieve. There's nothing to stop me from killing you this time. Let's end this." (Colonel Autumn's dialogue
↑Autumn: "You're in a heap of trouble, kid. You're a traitor to the United States government. You know what happens to traitors, don't you?" (Colonel Autumn's dialogue)
↑Autumn: "People of the Capital Wasteland. I am Colonel Autumn. By now, you have encountered Enclave troops in your towns, in your settlements. When you see the Enclave, you see the United States government. We are authorized to restore order and civility, by any means necessary. Just stay out of the way and let us do our job. Interfere with the Enclave's mission, and you will be dealt with. Harshly." (Colonel Autumn's dialogue)
↑Autumn: "Attention! This is Colonel Autumn! You are hereby ordered to ignore the President's previous directive. The prisoner from Vault 101 is to be shot on sight. I repeat, shot on sight. This is an order!" (Colonel Autumn's dialogue)
↑ED-E: "<Distressed beeping>" Whitley: "Dr. Grant? What the hell do you think you're doing?" Grant: "Ah, Whitley, there you are. Orders from Colonel Autumn - he feels the Eyebot Duraframe project isn't advancing quickly enough. I'm to-" Whitley: "You didn't even disengage his damage-avoidance protocols! You're hurting him!" Grant: "Don't be ridiculous, it's just a machine. See here, I've already increased the navigation system's efficiency by 65%." Whitley: "Get the hell out of here!" Grant: "Fine, Whitley, it's your lab. At least until I tell the Colonel about this." (Grant and Whitley's dialogue)
↑ 1.01.11.2Fallout 3 Official Game Guide Game of the Year Edition p. 66: "Colonel Augustus Autumn" "Autumn grew up on an oil rig off the California coast (the base of operations for the Enclave, the secretive contingent of the United States government that survived after the apocalypse). His father was the high-ranking Enclave scientist on orders from the president to move all high-ranking officials to the only other secure Enclave location with a functioning ZAX super-computer, Raven Rock. Colonel Autumn has proven to be far less subservient than his scientist father, often openly disagreeing with the president's decisions." (Fallout 3 Official Game Guide Game of the Year Edition Wasteland Census)