This is a side green to Manos: Hands of Fate by Human Superiority.
The first part was found here: http://pastebin.com/QBMRbrPv
Since Pastebin nuked it I'll also link the earliest thread I could find in five minutes looking in the archive: https://desuarchive.org/mlp/thread/24621019/
 
For the Manos threads. HEIL MANOS!

>You are Sergeant Ivory Keys of the Vanhoover Port Authority Police Department.
>You looked out over the city from a clock tower as you strained your horn to maintain the shield over the port.
>Under the moonlight you could still see the broken windows, the craters, and rubble.
>You could see the orange glow of fires still burning.
>Vanhoover was in ruins.
>It happened much faster than you could have ever fathomed.
>It started with thunder.
>First from the distance then in the very city you swore to protect as larges portions of buildings and even streets just exploded.
>Then they came.
>Forces of Manos...
>Forces of this... Reich moved into the city like great waves crashing into a cliff side made of sandstone.
>They tore great swathes in what meager defense the Guard had set up.
>Resistance was laughable at best.
>There were just too many of them.
>The Chief had ordered all officers to headquarters to coordinate with the Guard to protect the city but by then it was too late.
>They'd penetrated too far into the city to really form a defensive line which only pushed you back further.
>So many were lost to the chaos while the ponies in charge scramble to gain a cohesive hold on anything.
>And by the time the port was secured the Reich owned everywhere else in Vanhoover.
>From a tactical standpoint it was genius.
>Using a train to sneak an army and pushing as hard and fast as possible to gain as much ground as you could?
>Brilliant.
>To witness it and be on the receiving end of it?
>Terrifying.
>You've not known terror like this at any point in your life.
>And now that the assault is over and you are safely behind the shield, all you feel is an overwhelming sense of dread.
>You can see there forces outside of the shield from your vantage point.
>Simply waiting.
>Much further away, you could see flashes of a distant battle.
>Those were ponies cut off from your group during the attack.
>They were desperately trying to fight their way to your position.
>But it was no use and you knew this truth in your heart.
>With the flashes you witnessed came that same sound of thunder.
>Fighting against might of that kind was hopeless.
>"Sarge?" a feminine voice asked behind you.
>You turned to face Sea Shower bathed in the pale white light of your horn.
>The police recruit's uniform was torn in a few places and was stained with soot and dust.
>You didn't even hear the little mare come up and that made you mentally slap yourself.
>If she were the enemy, you'd be dead.
"Yes?' you grunted in response.
>"I'm here to relieve you," she said with fatigue evident in her voice.
>You looked her over and frowned.
"Are you sure you can handle it?"
>There was a brief silence before she answered.
>"Not really, but I can't let the others do it by themselves and I can't let you sit here and suffer magical burnout because I didn't try. You've been up here for twice as long as you should have anyways and I'd hate to see you hurt, sarge."
>You heaved another troubled sigh.
>This mare didn't belong here.
>You stood up and stretched out.
>Sea was right however.
>If you kept this up you'd end up with burnout and be completely useless.
"Alright then," you say slowly. "If you feel like you can't hold it yell for somepony."
>"I know the drill. G'night, Sarge."
"Good night, Sea Shower."
>With that you released your magic as she activated hers and started on your way.
>You descended the stairs, the clock tower bathed in sea blue ow instead your pale white.
>Even with six other unicorns maintaining the shield you weren't too sure if she'd be able to manage.
>You had trouble with it yourself despite you magical prowess.
>Reaching the bottom of the stairs, you step out with broken glass crinkling beneath your hooves.
>There various ponies are inside this building around a fire keeping warm from the cool sea air.
>You step out through not a door but a hole in the wall to the port area under the dome of the shield.
>It's much more packed than it was when it was first erected since the Reich turned over civilians by the hundreds.
>You begin walking to the warehouse that was being used as sleeping quarters by making your way past the makeshift barricades of shelves, desks, debris and other assorted junk.
>You kept at it but stopped and backed up.
>You would have missed it if you hadn't have been looking around but you needed to get closer to be sure.
>The building was much closer to the edge of the shield than you would have liked but it didn't matter because in an abandoned building through a hole blasted in the brick you spotted an upright piano just sitting there.
>You climb in and take a seat in front of the lovely instrument and tap a few keys with you weakened magic.
>It still works.
>You breath out contentedly as you begin to play with practiced ease.
https://www.youtube.com/watch?v=9E6b3swbnWg
>As you go on, a Guard in gold plated armor pokes his head in.
>Your eyes meet for a moment before he enters and sets his helmet on a table and just listens, losing himself to the distraction.
>This is followed by a few more ponies.
>Guards regular ponies alike come to listen to you.
>And for once since the beginning of this mess, you crack a smile.

>You are a Black hand outside of the shield set up by the royalists at the port standing on a barricade.
>You look through binoculars at crowd gathering near the edge but the music you hear says all you need to know.
>You wave a hoof telling everypony to stand down.
>It's not a threat.
>Just music.
>Wonderful, innocent music.
>You look to your left and spot a piano propped against a tree next to the shield.
>That was oddly convenient.
>You hopped down from the barricade and made your way to the instrument.
>You tapped the keys with your magic.
>A bit stickier than you would have liked but it works.
>You wonder what to play for a bit but one look at the moon tells you all you need to know.
>You begin to play.
https://www.youtube.com/watch?v=nT7_IZPHHb0
>The music on the other side of the shield stops and a police officer walks out of the crowd, looking to you with surprise.
>Your eyes meet and you know he was the one playing.
>You don't stop but you give him an nod to which he returns after a moment.
>He goes back through the crowd and you hear his piano again but this time he joins you in playing the Sonata.
>Its not exactly made for a duet but you appreciate the gesture.
>And so you play the night away on those dusty, ivory keys with the sound of thunder in the distance.