"Before Littlepip left Stable 2, a mare named Red Mist is out scavenging is the Equestrian Wasteland for food, weapons, and any sell-able goods, when she stumbles on an old, rotten, wooden shack. It's crudely built, but surprisingly stable, given how long it's stayed up.
"Red Mist walks inside, as any scavenger would do, only to find it empty, save for a pony's skeleton and a locked chest. Inside the chest, she finds one of the most valuable items in the Equestrian Wasteland. No, it wasn't the almost mint condition Pip-Buck, which is a rare find on its own. It was the information the Pip-Buck held within: The truth about The War."

Disclaimer:
This story is inspired by Fallout Equestria, taking place both during the war, and after, but before Little Pip. This story is NOT cannon to Fallout Equestria, but is my own take on what happened before Little Pip left Stable 2. Fallout Equestria, and the Fallout Equestria timeline belongs, in full, to Kkat: The Original Author of Fallout Equestria.