For a thousand years, Princess Celestia had managed to keep harmony and peace throughout Equestria. But all good things must come to an end. The griffons had grown jealous of the ponies kingdom and began to attack them. Celestia tried to reason with the Griffons but they began attacking cites and killing ponies. Thus the Equestrian Military was formed. All stallions of age were drafted along with some mares who worked as nurses and intelligence officers.
Many give credit to the pegasi for the flight capabilities and the unicorns for their magic but of all the types of ponies, the earth ponies were known for their brute strength. It is said one earth pony had the strength of three unicorn of pegasi. Much of the victories on the battlefield were not from the unicorns magic or pegasi wings, it was from the strength and valor of the earth ponies.
In response to the growing amount of surprise attacks on pony settlements, Princess Luna commissioned a special force group: Covert Operation and Lethal Takedown Squad or C.O.L.T.S. The group was meant to stealth missions. Unicorn magic could be detected and pegasi did not meet the physical requirements so only earth pony stallions were allowed into the group. This is the story of a C.O.L.T.S operative.