There are certain things that need to be done without the general public knowing, things that keep the peace in Equestria without a single word being said about it. This is where the CSF comes in. They are a group of the surviving alicorns banded together under Celestia to maintain order and peace through Equestria... Without anyone ever knowing who or what saved them. They are the ones who are called in to do what the Royal Guards can't. The ones who are called when all hope has been lost... They are, the Celestian Special Forces.