Camp Ferarro, a military camp that can be found near the Badlands of Equestria. This camp is used specifically to train new earth pony recruits to become well-disciplined guards. But before these recruits can graduate and become guards, they have their biggest obstacle at the start before training even begins.
***
So technically, this story would be considered a crossover because of a particular character I threw in here. I challenge you readers to figure out who it is and from where I got him.