[@Abefroeman] 
The most glaring issue I see right away is you military. Its large, its highly advanced and it put you at a huge advantage over basically everyone else. The sheer amount of military bases, naval bases, airfields and other places which you've gotten your equipment would have made your land huge targets during the end of the world; in short, there would not be much left of them and even less stuff you'd actually be able to use. 

In this setting, even WW2 era weapons can be considered cutting edge, forget anything beyond that. Automatic weapons versus the bolt action and semi-auto weapons can and will give your already massive army more of an advantage outside of numbers and possibly tactical ability.

As for your armored, I've already talked about oil stuffs (and will be updating the OP soon about it): Any old world refinery is also subject to being targeted and anything newly built after the end will make much lower quality fuel and less of it. Tanks and Humvees are also really fuel inefficient which is a major limiting factor why basically everyone else lacks proper armor vehicles. Even if they are more fuel efficient than Abrams (assuming any Abrams survived), it doesn't make them any more fuel efficient.

For the aircraft, first off just no. I don't care what explanation you have, the canvas aircraft of WW1 can already be seen as pushing it. You don't even own the Boneyard of AZ so how would you even get so many aircraft across what would possibly hostile territory. How many people would even know how to restore those planes like that? Most of them have rusted and scrapped to hell already.

As for the naval ships, I've already said that the vast majority of them would be at a naval base and thus in blast reduce or be an immediate target. I don't care how you use them, just no.

In short: You are [b]way[/b] to powerful for literally anyone else to oppose you. Your NS is rejected, redo your military and fuel production at the very least. Once that's been fixed I'll take a more in depth look at the other parts of your app which doesn't look to bad at least.