Well honestly it's a boon and con for the NCR. Any Pre-War caches of tech are substantially limited but now they have an excess of essentials such as food and water so the few scientists they have can now work on re developing trucks, power armor and better weapons.
You'll be looking at a much...
Like this and there was no Arrest or Charges because a Biden appointed judge and prosecutors went out of there way to turn a blind eye.
What would be the political climate?
Nope. It's actually back and has Loki as the pseudo God of MCU now. Recent comics also had the TVA Cross into the Marvel 616 verse and connect the Alternate Spider verse timeline with 616.
The Federation win because of th bat shit crazy suits, without it tho I feel like it'd be close considering the extremely limited numbers involved here. They could probably at best only have enough manpower to conquer one Coast of America unless liberal use of orbital bombardment is allowed.
The Bugs force a stalemate with the UNSC. The Mobile Infantry is better suited for subterranean combat than the UNSC are. The UNSC are heavily reliant on their vehicles and airpower which are redundant in subterranean combat.
Spartans II's & III's being present on the battlefield will be the...
Yeah analogy wise it is like if a small band of Uruk-hai invaded the Shire. There's enough Hobbits (Europeans) that it'll keep Russia tied up and unable to do anything and can even possibly result in a loss if they take too long in their conquest