I watched the whole series twenty six times, and yet I don't even know, Army.
I'd have to guess it's a creepypasta or a Chaos form of Twilight Sparkle.
@Frostbyte
Soarin and Dash = Yus.
Twilight and Dash = What is this lesbian stuff
Pinkie Pie and Dash = OH DEAR GOD NO WHAT THE forget. -puking noises-
Applejack and Dash = .. i think this is a bit hot or something.
Mainly Soarin and Dash.