Still I remember the Devs saying NCR's switch to paper money was because the Brotherhood have been hitting NCR supply lines and gold shipments.
I suppose the question is how recent the destruction of NCR's gold reserves were. The switch to paper money could have been done years or decades ago timeline wise. The timeline seems a bit vague but I get the impression Kimball was a veteran of the Brotherhood War and obviously Father Elijah came from a Western Brotherhood of Steel fairly recently, so the Western BOS is still around in some fashion.
If I had to GUESS, I'd say the Brotherhood War probably ended not long before Kimball's term and Elijah left for the Mojave period around that time. It's possible that the Brotherhood is "contained" as opposed to being actively pursued.
Still this war started over the Hoover Dam did it not? Brothehood no longer have the ability to take the dam.
I don't think the Brotherhood was ever interested in Hoover Dam. The whole thing was basically a gigantic cluster**** created by Father Elijah, who really was incompetant as a leader. He wanted Archimedes I and II above everything and basically, the NCR found the Brotherhood in the Mojave and decided to do some shooting at them. Elijah refused to abandon Helios One and pretty much wasted dozens (hundreds?) of Brotherhood lives engaging NCR in a straight-up fight while he tried to get the satellite weapon working.
NCR and Brotherhood for lack of a better word used to be friends. Friends sometimes fight.
Allies tend to shift very quickly in wartime. I wonder if Kimball's predecessor antagonized them somehow.
NCR was not getting involved in a war in the Mojave. They were involved in simple expansion "building the frontier." Then there was the Brotherhood War and NCR won at least against the Mojave Chapter cutting them off from the rest of the BoS. Then the Legion came along. NCR was not going into the Mojave thinking they would go to war with anyone.
Yeah, I'm not sure but I think it mostly was just NCR stumbling onto the Brotherhood and being technically still at war - deciding to attack. It's also possible they wanted Helios One purely for the Solar Power generating abilities (in which case that was just dikeish of them). Outnumbered 20-1, Father Elijah continued to hold down the fort and endure attack after attack by NCR until almost all of his veteran soldiers were dead and half the chapter was destroyed.
He then abandoned them to go treasure hunting at Sierra Madre. I'm guessing the BOS then installed McNamara as his replacement (unless he was already Elder and Elijah just had seniority - I'm not sure if Elder means "head of the chapter" or it's a rank like Jedi Master).
Still NCR was willing to listen. Now if the NCR BoS war was still raging back West I doubt any NCR would be willing to make an agreement that is not total surrender to the NCR.
The agreement with the BOS and NCR was done without Colonel Moore's consent and gets the Ambassador fired for it (if she's promoted to Brigadier General). NCR just seemed inclined to honor it despite the fact that Moore obviously wanted to just wipe them out.
NCR and Van Grafts are enemies. It was not till New Vegas that they finally made a deal. Gloria Van Graff: "Time was we used to be able to hold our own against the NCR but thats not the case anymore. My family has enough men and weapons to field a small army, but the NCR can field a really really big army."
Well, what I'm saying is we don't know how far the failure of energy weapon containment has been. The Van Graffs, I admit, could just be the sole party with access to energy weapons in-bulk.
We don't know if NCR allied with the Shi. My point is Power Armour is like having a tank. If you are going up against people that have it and have energy weapons. You are going to want it yourself. NCR does not seem to have the Power Armour. All they have is the T-45d armour and its just a shell. It does not have the Power anymore. If they were with the Shi they would have working PA.
The Shi had, with the help of the Chosen One, working Vertibirds. They also had AI and working infrastructure but there's no indication they have the ability to manufacture Power Armor. To be fair, neither does the BOS. It's one of the things that galled the BOS in Fallout 2 that the Enclave had the ability to manufacture Power Armor while they had to simply make due with Pre-War suits.
(To be fair, this isn't a sign the Brotherhood is backward - in real life, you can find the plans for an atomic bomb on the internet and they're real. Tom Clancy tested it and found out it was the case, it's just that the tools are THAT nearly impossible to find).