yes, i like! cant wait for more!

October 23rd, the day everything changed. Very nice Cooperdawg

Good so far

So you went ahead and wrote this I see, pretty darn good so far.
Couldn't spot any grammar errors, but I wasn't combing for those anyway. One tiny nitpick I have with the formating is that not having an extra line between paragraphs sort of induces 'wall of text glazed eyes' for me, but that's just a personal issue.
Let's see if the Mane6/Ministry Mares are in their early 20's when the show starts then 47 years later would make them late 60's...that sounds about right time wise. Anyway here's a timeline from the wiki in case you didn't know about it FOE timeline. (Not that it matters after that the bombs have been dropped, because of the lack of events afterwards)
Again a tiny nitpick, but considering that Equestria had Celestia One and presumably other instant cast megaspells, it wouldn't make sense that Equestria would be firing missiles back at the Zebras (unless they're some kind of defense missile). Again it doesn't matter now that the world has ended, just a line that took me out of it for a moment and just because I'm around people who put way too much thought into that sort of thing.
I could nitpick your apocalypse some more, but it doesn't really matter now that the world's ended.
Cirrus seems like a pretty standard everyman/pony, though I have doubts on how long his wife will last...and what his reaction to that might be...
Can't wait to see how the survivors get by in the newly created wasteland!

3292114
Thanks for the feedback, and especially for the nitpicking. Honestly, I realize that some of it will fall short of what the canon says ACTUALLY happened, but I was also going for more of a symbolic gesture with the return fire of missiles, more or less for the realization that the apocalypse was, in fact, actually happening. Also, I don't really put quite THAT much thought into it, and usually just write what feels right.
That link to the timeline is going to prove really useful, and I'll probably using that quite a bit as well.
As for the stylistic nitpick (the so-called 'wall of text'), that formatting is my preferred system, simply because I use the empty white space in order to show a big change in setting, or the passage of time, or something along those lines. It's basically the format most modern novels are written in, which is also the reason I use it.

3294907 FiMfiction does have a 'horizontal rule' option you can add and most authors here use those to separate segments (I think, I've never written a story), but whatever, its your story.