We stormed Area 51 looking to clap dem aliens' cheeks. I never could have expected what we found.

...because of course 300 000 people would be enough to storm a highly defended military base, and of course the portal to Equestria would be inside (whoops spoilers (like this was really a spoiler in the first place and not the logical conclusion to a story featuring humans needing an excuse to go to Equestria.)).

You saw the cover art, you saw the short description. You know what to expect.

Cover art by the astounding Axxuy.