you know you are gonna have a bad day when you get sucked into a sink hole

Equestria has known only peace for the last 1001 years, but now a new threat is brought into equestria that brings the country to its knees in under a week. The only hope lays within the hands of an odd and very underestimated ally

What happens when you are turned into a unicorn, sent to a magical world of ponies and trained as an elite solider to become the personal guard of one of the princesses?