When the gym class teacher breaks her leg during a martial arts session, Principal Celestia and Vice-Principal Luna have to turn to someone they didn't want to turn to from the beginning.

Gunnery Sergeant Hartman.

Rated 'TEEN!(?)'
Expect swearing. Lots and LOTS of swearing, and also sexual humour.
Set within the Equestria Girls universe. Set before events of Sunset Shimmer's downfall.

"We have to be brave now, Scootaloo," Dash said. "Just close your eyes, and it'll be all over by the time you open them again."

On the 2023rd year of the reign of the Royal Pony Sisters, a fleet of ships from the alien alliance known as "The Covenant" attacked Equestria. While the orbital defense grid and its crew fought valiantly, one cruiser managed to evade and is now hovering over the mega-city of New Manebasa. Reports so far indicate major damage and heavy casualties. While the last Spartan-II in service has been reported to be assisting the battle, the ENSC has organized Teams of Orbital Drop Shock Ponies, or ODSP to land on the carrier and capture or destroy it. Gunnery Sergeant Rainbow Dash has recruited four of her friends to help with the assault. If all goes well, this should be an easy mission...

Crossover with Halo 3 ODST, which is owned by Bungie.

For anyone who wishes to see all of Sadie's story since I'm skipping most of it, you can watch them all here.

August 22: Added title pun because why not.

Once upon a time, on the not-so-magical planet Earth, there was a US Marine who signed up to defend his country. He was assigned to a fire team, the fire team assigned to a squad and the squad assigned to a platoon. Together they defended the area surrounding a Forward Operating Base in Afghanistan from insurgents. If only it were that simple.

When lone Marine is transported to Equestria he finds a post-apocalyptic wasteland. With no orders, no resupply and seemingly no hope of return, he sets out to find what brought him here, and why.

Strong Language Warning: He swears like a Marine.
Disclaimer: I'm not a Marine

What do readers have to say about this story?

"[T]his has to be the dumbest sounding plot I've ever heard of. But my god do you take that and fuck it in its ass ... Its just so real and witty and genuine that the whole premise actually works!" ComprehensiveBrony

"Yes, it's human-in-Equestria, but it's good. ... the action scenes had me sitting on the edge of my seat" Tebee

Cover by me, background stock by DarkDragon774

There is a flood on the horizon. Equestria's enemies have united, and the coming tide will not only change the course of history on one world, but two, and bring about a monumental meeting that will bring brothers and sisters from those two worlds together.

At long last, the downtrodden will rise.

The battle begins.