SGT Jennings dropped into New Mombasa to take over a Covenant cruiser. When a lucky Anti-Aircraft shot takes away his ability to control his pod, he careens end-over-end into a slipspace portal, and emerges in Equestria.

Be warned, there is more cursing in the beginning then there will be later, due to an all-military environment in the beginning.

It is the year 2552 and the Pillar Of Autumn has just entered Slip space to escape the Covenant fleet at Reach. A malfunction occurs with the Slip space drive and sends the Autumn and her crew into unknown space. The first planet that comes into range is very Earth like, and is giving off intelligent life signatures. What they don't know is that their only way back home is on this planet. The Autumn dispatches a scout party and what they report back is unbelievable. A world completely inhabited by ponies, millions of them..... Welcome to Halo: Equestria.

I'll add in more character tags as they are introduced in the story.

Cover image is: My Little Mjolnirs: Friendship is Mark VI
by *COBilly
Fan Art / Digital Art / Drawings / Games ©2012 *COBilly

Halo is the property of Bungie and Microsoft.

My Little Pony: Friendship Is Magic, is property of Hasbro and Lauren Faust

I do not own the cover image, Halo, or My Little Pony: Friendship Is Magic.

2022 REWRITE IN PROGRESS

After being rudely awoken from Cryo-sleep, John-117 finds that the Forward Unto Dawn has been sucked into a gravity well, causing it to fall towards an unknown planet. In the crash, he is separated from Cortana and falls alone into the Everfree forest. In addition to this new complication, old memories from a scarred and tragic past haunt his dreams, putting his remaining sanity on edge.

However, he has little time to ponder these thoughts, as he encounters the planet's... peculiar... inhabitants.

First 19 Chapters proofread by Bravo 539 and Shadownamesto.
Credit for the intro sequence goes to Blaze Spectrum.

Current rewrite will not necessarily follow the old story but certain events and details may be reused.

For as long as Rainbow Dash could remember, her life was simple, straightforward, and planned out with one goal in mind: become the best flyer in all of Equestria. Simple. But when she unwittingly comes across a tool that allows her to relive the memories of her ancestors, that simplicity is challenged when she discovers dark secrets hidden in her family's past as well as Equestria's history that not only challenge her perceptions of reality, but threatens to alter her very psyche.

As she's thrust into the remnants of a centuries-long war, as she questions the morals of those around her, as she battles to separate reality from fantasy, will Rainbow be able to hold on to her own beliefs or will she embrace her family's blood-stained traditions and finish what they started?

While pursuing a splinter of Hive Fleet Behemoth, Captain Sicarius and the Ultramarines 2nd company are caught in a warp storm that carries them and their prey to an unknown planet. Meanwhile, Princess Luna notices something strange in space that could spell danger for all of Equestria. Swept up in a war between the terrifying Tyranid swarm and the vengeful Ultramarines, the ponies must fight for their lives in a war that spans a galaxy.

Thanks to thirdstring_overlord and GiftedMonster for proofreading my newer chapters. thirdstring_overlord also writes an excellent 40k crossover that needs some fans. Go check it out!

Disclaimer: I do not own My Little Pony: Friendship is Magic and Warhammer 40k. They are the properties of their respective owners.

Applejack finds a strange visitor in her apple orchard one day, with even stranger stories to tell...
MLP/L4D2 crossover. My first story on FiMfiction.net! May add more tags as story progresses.
Credit for the image goes to brokencreation on DeviantArt.

A crossover of Red Vs Blue - the Halo Machinima series - and My Little Pony: Friendship is Magic, primarily starring Epsilon, who is recaptured within the Epsilon Unit and finds himself in the land of Equestria. Will the resident ponies and him become best friends, or will the situation degrade into a flurry of insults?
Hedge your bets, folks.