This story is a sequel to Stardust

When Equestria’s newest member of royalty asks for aid to be offered to her friends from abroad, the best and the brightest volunteer to serve. Captain Steel Song of the Dusk Guard are immediately mobilized to help XCOM defend their world from the enemies that besiege them. However, their first joint operation with the humans takes a turn for the worse and they quickly find themselves fighting for their lives against the full force of the monsters that threaten Earth.

(Stardust/Dusk Guard crossover)
(Coverart provided by a friend of Viking ZX!)
(While familiarity with both stories isn’t required, it is recommended)
(Many thanks to Arzoo for pre-reading!)
(All screenshots can be found at XCOM.wikia.com)
(Featured on 3/13/2013. Thanks everyone!)
(Now has it's own section on TVTropes as part of the Stardust series!)

Cpt. Daniel Peters, British Army, 1st Armoured Infantry Brigade, 7th Battalion.

That’s who I was, who I try to be even though I can’t.

My life wasn't perfect, wasn't great, wasn't bad either. It was ordinary. Was Ordinary.

Now stuck in candy land I have no idea if I’m dreaming, died and gone to heaven, gone to hell or all three.

The Princesses find an alien creature barely clinging to life at the scene of a terrifying crash. Can the Combined Power of the Elements of Harmony save it, or more importantly, should they save it? Will the arrival of this strange creature tear Equestria apart?

TV Tropes
https://tvtropes.org/pmwiki/pmwiki.php/FanFic/Article2

Team Yankee is an armor-heavy company, or 'team', composed mainly of M1 Abrams tanks. Their parent unit, the 1st Battalion of the 4th Armored, is stationed in southern Germany to help defend against possible Soviet attacks. Under the command of Captain Sean Bannon, the team is quickly placed on the border during a period of high tensions with the Warsaw Pact during the late 1980's. Though there is nothing special about this particular team, they will quickly find themselves in a very unique situation.

Notes: Prior knowledge of the book is not required.
Rated Teen for harsh language and some gore.
My Little Pony: Friendship is Magic created by Lauren Faust and owned by Hasbro.
Team Yankee written by Harold Coyle.

It seems Princess Luna has been abandoning her royal duties and vanishing every Friday night.

There's no reason, no notes, no clues as to where or why she keeps disappearing.

So Celestia sets out to discover what has been happening to her sister.

Nobody wanted it. American soldiers in Equestrian streets. Hundreds, thousands of dead. A city in ruins.

Nobody wanted this.

This is not a story about closure or healing. A traumatized soldier is NOT taken to Equestria to heal his war-torn soul. This is a story about an unfortunate series of events that get a whole lot of ponies and people killed.

Currently undergoing rewrite. Former Chapters 6-15 as well as the incomplete, unpublished Chapter 16 available for viewing on ArguingPizza's Scrap Files

Rated T for language

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

War. Noun. (1) : a state of armed conflict between different nations or states or different groups within a nation or state.

"Soldiers are always preparing to fight the previous war" is a saying that is common amongst those of military profession. Equestria has not seen a war on her own soil in several hundred years. As such, would she be prepared for when such a thing happens? Of course not.

Battling the griffons and the minotaurs has been a challenge due to lack of experience. Fortunately, her armies adapted and started to hold her own. That was, until Tirek returned and aided in the fight to defeat Equestria. To keep his friends safe, Discord successfully defeated Tirek and sealed him away. The cost of fighting Tirek? Dying. Knowing that he would die, Discord summoned several creatures to protect his friends. These creatures, never seen before in Equestria, are very familiar with the concept of war.

This world has experienced their second industrial revolution and Equestria is at war, a World War, the first this world has seen. Equestria and her citizens have a lot to learn if they want to see the end of this conflict with their culture and way of life preserved.

Author's Note: I have deployed so updates won't exactly be plentiful. I'll definitely try to put them out but I'm pretty busy.

Author's Note V2: Deployment is done.

Author's Note V3: Gearing up for the next deployment, busy again.

Author's Note V4: Not deploying with unit, got run over by a car while walking

XCOM Record: Operation: Rising Star
11:52 am, 18th Febuary, 2016
Northwestern Territories, Canada.

Summary: Witness reports contact with extra-terrestrial creature. X-ray is unconcious and unresponsive. X-ray does not match description of previously observed species.

Response: Strike-One dispatched on high alert, orders are to recover X-ray alive. Alien Containment prepared for the new arrival.

***

The war ended. They were beaten back, their mothership destroyed, their command structure in ruins. Lost ships and soldiers continued in vain, but thanks to XCOM, humanity won, and the world was saved. The Volunteer saw to that - everything changed because of one man.

And then suddenly, everything changed again. Only this time, it's not a man's doing - it's a mare's.

Proofreading by the aweome Setokaiva, entirely without me asking!
Tagged Dark and rated Teen: Gore, because there is going to be some blood shed by the end of this.

It started when ponies started going missing. It was small towns and villages that reported them first.

After an attack on Manehattan of seemingly unknown origins, The Regal Sisters begin talks of reviving an ancient order meant to defend Equestria and the rest of the known world from threats deemed 'other worldly'.

Much to her dismay, Twilight is chosen to lead Equestria's first—and last—line of defense.

I figured I could put my ongoing misadventures in X-COM and turn them into a fic of some kind.
Wanna be involved in the war? Join The Initiative here!

Kinda toyed with this idea for a bit until I was completely comfortable with it. Hope you like it! Please leave any feedback in the comments!