The Cutie Mark Crusaders, years ago they got their Cutie Marks together and set out to try and help other Ponies figure their own marks out. However when the war with the Zebras began and the threat of megaspells became very real, they began to drift away from their mission in favor of helping preserve Equestria.
On the anniversary of them getting their Cutie Marks, Scootaloo is too busy to join her friends for the celebration, so they bring the celebration to her at the office. As they reminisce about what's happened since then, they know their future may not be guaranteed.
Set in the universe of Fallout: Equestria by KKat.
Done sort of as a response to a contest done by the Cutie Marked Crusaders group, but not for the contest.
Image credit goes to its creator.