It's something that's been puzzling me since the game came out but just where are they?
They obviously didn't blow up the citadel but they were the brotherhood's best soldier you'd think they'd be in the game if they were still loyal to them. If their gone does anybody mention them in the game or do they just not?

Is imply (dont remember where) that he banish from the Capital Wasteland but the 2287.

Self-imposed or by maxon?

From what I've played of the Brotherhood of Steel story (haven't finished the main quest), the Lone Wanderer isn't mentioned at all. We get backstory on Elder Lyons and his daughter via Elder Maxson's background. There is never any explanation of where the Lone Wanderer is, even though he/she would have been a worthy candidate for Elder of the east coast of the BoS. This game takes place only ten years after the events of Fallout 3, so my understanding is BGS is just avoiding the player character coming into play. Considering he/she had no voice and BGS could not really control to the extent what the player did, it's just easier to avoid bringing the Lone Wanderer into play.

If Elder Lyons die (presume by old ) and his daughter die to on combat. I dont think the Lone Wanderer was going to be choose over Arthur i mean is a Maxson, and for what i get he prove himself on combat and tactic knowledge.

Well somebody is probably still in charge of defending the Capitol Wasteland for the BOS.....or at the very least assuming they have returned mostly to the BOS fold under Maxson, then the Citadel and high value locations.

You'd think the brotherhood would at least mention the guy who lead them to glory on several occasions(p.s. I do agree the LW would have been a more logical choice for elder than the ten year old, thou I don't understand why paladin cross didn't become elder after Sarah since she was directly below her)

I do. Maxson was a kid. The Lone Wanderer literally saved the BoS and is the reason they even exist to this day in the Capital Wasteland. Everything Maxson has done came after the Lone Wanderer.

Not only led them to victory, but saved them. Period. Without a doubt LW would have been a more suitable choice than the kid wandering the Citadel, regardless of what he may have accomplished. As far as Paladin Cross, I could see her refusing the position as she was always more of a bodyguard than a leader. Really, I think ignoring the LW was a practical matter of BGS not dictating to the player who the LW was, as that always makes role players freak.

Every fallout sequal made mention of the previous game's protagonist even fallout 3 briefly mentioned the Vault Dweller.

During a conversation with Maxson, he mentioned the Citadel and said it USED to be the most fortified stronghold of the Capital Wasteland... Used too. This may be implying something.

That they made a better stronghold.

I meant to say of the Capital wasteland. I also remember him saying something else implying it's gone, but I'm not sure what he said.

Again, I think the LW is in a tenuous situation given his/her connection to the BoS and how vital their role is in Fallout 4. I think for creative liberties BGS just wanted to avoid the question. I think many would have been upset had BGS merely written him/her off in a way that did not reflect what a particular player perceived their LW would have done.

My LW was a she, and she saved the Sheriff as well as Megaton.

Afterward is the epilogue of Fallout 3, detailing the canon outcome of the games events. It was included in the first edition of the Collector's Edition Fallout 3 Official Game Guide, written as a terminal entry.

I'm not if that epilogue is canon or not.

He's at home, washing his vault suit.

Wondering why he bothered in the first place.

Huh? The Lone Wanderer is kicking it in the Capitol Wasteland, drinking clean water at his house in Megaton. Every year he heads to the Citadel to mark the anniversary of the noble sacrifice of Sarah Lyons with the rest of the Brotherhood.

Due to multiple endings, Beth can't bring in the LW - if they did, they would have to choose a canon outcome for FO3's ending, meaning the choices of many players would immediately become non-canon and thus, to some extent, irrelevant. For example, In some games, the LW died saving Project Purity - I'd hate to have made that choice then see the LW pop up in FO4 - I'd be like, "Well, guess Beth decided I made the wrong choice and have 'corrected' it for me".

A simpler argument: The LW was us, not an NPC, so unless you can control two characters simultaneously we won't be seeing LW vs SS.

I just started having Deacon as a companion. In his rambling, he states, " I miss the capital wasteland, you can actually drink the water there." Also he states, " I think next time, I will tell everyone I'm President Eden. Think anyone will believe me?" I'm hoping he might reference the LW.

I don't think that epilogue is canon. I actually messaged GStaff about this a while back to see if it was cannon or not. He hasn't responded back yet.

At one point, I heard them mention Sarah and Elder Lyon's "friend" in a quotable way.

I get the impression the Lone Wanderer has been exiled from Brotherhood history.

Maybe he/she is one of the "ineffectual" elders and there's some Stalinist revisionism going on.

The data terminals also state that Arthur was picked by the Elders of the Western Brotherhood of Steel (!!) who not only still exist but would take one look at a Wastelander being raised to Elder Status and go.

"AWWWWW, HELLLL NAH!"

I think it's canon that the LW helped the BoS take to the fight to the Enclave and blow up their base at AAB.

Somewhere during the main quest, Paladin Dense mentions that the BoS assaulted the Enclave's main command post at the AAB and completely destroyed it. I think he also says they constructed the Prydwen from the wreckage at AAB. I might be wrong on who exactly said what, but I'm certain that they said AAB was completely destroyed. I guess that makes it the canon ending as opposed to blowing up Megaton or the Citadel, or even Rivet City.

How?

Yeah. I'm of the impression the picture being painted by Elder Maxson and his cronies isn't actually reality. I have a feeling the LW likely did become Elder and was trying to bring sweeping changes, but something happened. I don't know where he/she is, but he/she has been erased from history with only tails of how amazing Elder Maxson is, killing super mutants at the age of 13 and all that other nonsense.

What really had me scratching my head is the Elders of the Western Brotherhood of Steel never approved of how the Eastern Brotherhood of Steel was run. Regardless of Maxson's bloodline, I could not see them breaking tradition to allow a mere kid to become the leader of the entire organization on the east coast. It just doesn't add up. The more I hear the Brotherhood of Steel praise Maxson, the more I believe this is nothing more than brainwashing and he's actually an illegitimate leader.

Regardless, I don't expect to see the LW make any kind of appearance in Fallout 4 in any capacity due to whatever BGS deciding limiting the scope of who the LW is for everybody.

Maybe Elder Maxson is a puppet for the Elders of the Western Brotherhood to rally their troops support behind.