Ahriman's POV

It had been three years since I had joined Princess Luna in her war against Celestia, three years of bloodshed. I had risen quickly in the ranks, and soon established a Librarian Faction of the Lunar Rebellion, which now called itself the Lunar Republic. As tales of me spread like wildfire throughout the Solar Kingdom, now named the Solar Empire, and now most of The Solar Guard would run at the mere sight of me. I soon became the right hand of Luna, her ultimate winning card. The novice mages I had trained grew into great Librarians, and could now cast most spells that use the warp with ease. And now, I am heading to the meeting room to discuss our next target. As I entered, most of the guards either bowed or nodded in my direction. I sat down at my seat in the war room, next to the Princess. When Luna herself entered, everyone, including myself, knelt down before her. She nodded.

"Rise, my commanders." She ordered, and everyone returned to their seats. I carefully listened to what each commander suggested, but their goals weren't big enough. After a few more minutes of discussion, I decided to intervene.

"I propose we go for a bigger target." I said, interrupting a commander speaking about engaging in a battle with a small town. Luna looked at me.

"What do you suggest, Librarian?" She asked me. I examined the map before smiling. I pointed to a spot on the map.

"Here." I said, and the commanders each looked at it before they're eyes widened.

"Are you insane?! That's one of the most fortified cities in the entire Empire, aside from the Castle! How do you expect to take this one down?!" One of them shouted. I raised my hand, silencing him.

"I know that Manehattan is a big target, and it is truly one of the most well defended places in the Empire. However." I lowered my hands onto the table, "We haven't been serious enough in our war against the Solar Empire. The most we have done is raid transports bearing weaponry or food. This city is a major trade route, sending out food and supplies to all corners of the Empire. If we take it, and hold it, we can cripple the enemy like never before, and possibly forcing Celestia to face us personally. This is the opportunity we have been waiting for. If we take this now, the enemy would take a few years to recover from this. I suggest we join all of our forces across the Lunar Republic and take Manehattan with the strongest force we have ever had. I will personally lead the assault, along with my cabal. Now then, are we in agreement?" I finished gazing at the commanders expectantly. Slowly, one by one, hoofs slowly raised in the air. I nodded.
"Wait! If we move our forces defending our borders, the enemy could use this chance to attack!" The one general who didn't raise his hand exclaimed. I thought over it for a minute before getting an idea.

"What if the major movement of our forces looked like we were preparing for a full-fledged assault? They would be more preoccupied with getting ready and trying to deduce where we will hit than attacking our borders. Plus, I have heard rumors of an armored warrior much like me with a distinct hatred for Celestia's forces. And I have seen the evidence. This rumored warrior is a Chaos Marine, like me. Except he is in service to the Blood God Khorne. Before the attack, I will locate him, and try to get him to defend our borders in case of Solar Empire assaults.

Also, I would like to meet with the 45th Company. I have also heard rumors of a strong warrior, almost like an Astartes. I dare say that we might have two super soldiers serving with us. So, is that all?" I looked to the group. They all nodded, except for the general, who fumed before stomping away. This behavior concerns me, as if he wanted me to call off the attack. As the other commander's and generals left the war room, I pulled Luna over for a quick chat.

"I want to have on of my Librarians keep an eye on the general who spoke out. He was actively trying to get us to call off the attack. I fear he may be a traitor." I whispered into her ear. Her eyes widened and her ears flattened before looking at me.
"Art though sure?" She asked. I nodded. She sighed. "General Blade Work has been a general in my army since before the uprising. I should trust him, yet... what you say does trouble me to a great degree. Very well, send one of thy Librarians to keep tabs on him. We cannot dismiss the possibility of a traitor in the inner circle. We shalt take our leave now, Ahriman." With that, she teleported to her personal quarters. I sighed, then teleported to my Librarian training center.

Over the years, a mass influx of new Psykers had risen up in the Batpony ranks. And I trained each and every one of them. I moved towards the area of one of my first students. Though they did not have the same amount of power as myself, they each had a very capable amount of power within them. I reached his room, and politely knocked on the door. I heard a grumble as he shuffled out of bed. When he opened the door, he immediately bowed.

"Lord Ahriman! What brings you here? Training sessions aren't until tomorrow night." He asked. I gestured to his room, and he understood immediately, allowing me to pass inside. I sat down on a chair and faced him.

"Elderith, my student, as one of my first students, I must go to one of you for assistance when I cannot get something done." I told him. He looked at me questioningly, before motioning for me to continue. "We believe that one of the Generals, Blade Work, is a traitor to her majesties cause. Though we do not have solid evidence. That is where you come in. I want you to observe him, probe his mind,and make sure that he truly is pure to our cause. If he is not, well..." I paused for dramatic effect. "He will be brought to Luna in chains, and I will reveal to her his mind. Then, I will execute him myself, and send his soul to the warp as an offering to Tzeentch. I trust you with this. Do you accept?" I asked him. He nodded instantly, a firm glare in his eyes.

"Very well. You begin immediately. I shall leave you to it." With that, I got up from my chair and exited the door. I then went over to a desk, and, pulling out a few sheets of paper, began to write.

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Khârn's POV

As I finished up another patrol, I decided to head to the bar. When I got in, everypony there cheered for me. In the few years that I had been with the Company, I had quickly earned their trust and friendship. Hell, I even somehow managed to get a small fanclub, as well as a cult Dedicated to Lord Khorne. So I was content. I didn't come here for drinks, however. I walked up to my good friend Captain Steel Wings, and gave him a tap on his shoulder. He looked up to see me there.

"Oh. Hi Khârn. How's it hanging?" He asked. I shrugged my shoulders.

"Been good. Felt like heading over here to tell one of my infamous stories of the Great Crusade. I believe that it's time for the grand Story." I then sat up.
"Everyone! May I have your attention please!" I asked, and everyone went quiet, knowing to never disregard Khârn, even when they were drunk. "I have come here today to tell of the Grand Tale of... The Seige of Terra!" I exclaimed, and the people in the bar cheered. I raised my hands in order to settle them down. "Now, gather round guys, this one's a good one." They all quickly gathered around my feet, and I began my tale.
(Note: You can skip this if you want. It's just a retelling of the Seige of Terra. Everyone knows this. Except for ponies.)
After The War master Horus' Fleet defeated the Imperium's fleet in orbit, we descended down upon the great cities of Holy Terra to defeat the Emperor. He had hid himself deep into his palace, which was turned into a great fortification. The first thing we did after beating the fleet was bomb the place. After that we dropped down in pods of metal, and quickly secured the closest spaceports. After we captured the space ports, the army of Horus came down to the planet en masse. The first thing we did in the true seige was push the Loyalist legionnares back into the Imperial Palace, and my Father Primarch, Angron, walked right up to the walls of the Imperial Palace and demanded their surrender, saying that they were cut off, surrounded, and defending a lord who did not deserve their loyalty. It would have worked, if it weren't for the Blood Angel Primarch Sanguinius. The two of them just stared at eachother before my father turned and headed back to the army saying the there will be no surrender. And so it began three times the Chaos Marines surged to the walls, and three times did The blood Angels and Sanguinius Push them back. Then, Horus got pretty Pissed that his seige wasn't going as quickly as he had hoped. So, he had the Titans sacrifice themselves to burst open the wall. They did, and we swarmed the place. I was the first in, actually, and scored millions of kills.

As we prepared to fight on the next day, however, the Primarch Jaghatai Khan of the White Scars did a sneaky move. He broke into one of the spaceports, took control of it, and halted our fresh supply of troops. After fifty five days of attacking the palace walls, Horus got extremely tired of this bullshit of a defence, and, seeing a fresh group of Imperial soldiers nearing, issued a challenge to the Emperor. He lowered the void shields, allowing the Emperor and his honour guard into the ship. Eventually, Horus fought the Emperor, and lost, but not before gravely hurting the Emperor and getting him stuck to the golden throne. We were pushed back into the eye of terror, and loads of shit happened after that.
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As the crowd gazed on me in awe, a soldier, one of my personal squadron, burst through the door.

"Lord Khârn! We have received a message from Luna's Right Hoof!" He passed the letter to me before exiting the bar. I read it out loud

To the 45th Company,
You are hereby ordered to return to the Lunar Republic Main Base to Prepare for our latest operation. The details will be explained once everyone has arrived. Also, as The Right Hoof of Luna, I am ordered to inspect our troops personally. I request that all of your soldiers are to report to the Parade Grounds for inspection. Do not leave a single soldier behind. You are expected to arrive in two days time.
Her majesties Right and Iron Hoof,
Chief Librarian Ahriman.

After rereading the words at the bottom, I looked to the rest of the bar's customers. Steel Wings nodded, and spoke to the crowd.

"Citizens! Please be warned. There may be an attempt to reclaim the town for The Solar Empire. But fear not! If you do not resist them until we return, and play the part of helpless captured civilians, you will be spared by them. Until this operation is over, we will be forced to leave you, but don't worry. We will return. That is a promise."he spoke to them. They seemed relieved at that. Steel then turned to me.

"So, Khârn, shall we be off then? We have to gather the Company and head out immediately." He said, and I nodded, and followed him out of the bar. We walked to the middle of the encampment, where the entire Company was gathered. After a few moments, Steel spoke.

"Soldiers of the 45th Company! As I'm sure you have heard, we are to return to the capital of the Lunar Republic to prepare for some sort of operation. Sadly, we are forced to leave the kind ponies of this town for now, but when the mission is over, we will return." Most of the batponies shuffled their hoofs. "And this is also a time to rejoice! We have been contacted by Princess Luna's Personal guard and been told to return home for the first time in three years! We can finally meet up with our old relatives and family! Also, our good Friend and Superior Officer Khârn The Betrayer wishes to speak a few words." He gestured for me to speak. So I did.

"Throughout the three years I've been with you guys, you have shown me trust and friendship like no other. We have fought and died together, and I am proud to call you my Battle Brothers." I told them, showing a small hint of emotion. The Company were all beaming with pride when I looked up at them. "Now then, my battle brothers, let us head to the Capital, and finish this operation so we can share our stories of the most certain battle coming up! For Princess Luna! For the Lunar Republic! For Lord Khorne!" I shouted, and they all repeated our battle cry, which I had come up with in the heat of the moment during one of our battles. It somehow managed to stick. And with that, we marched out into the snow.

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Third person POV

Little did Khârn know, him and his company were being watched by a group of Solar Guard hiding in the treeline. One of them turned to a new recruit, a rookie named Salesworth.
"Send this news to the Princess. She must be warned." He told him, and the rookie nodded before taking off into the forest.

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Celestia's POV.
Today had been a long day. Report after report came through with basically the same message. That the Lunar Guard were leaving their fortifications. This could mean only one thing: Luna was planning something. But one report was different, for it had a report about a tall, bright red bipedal creature leading a full company out of their fort. This meant that Luna had made contact with the Impaler, and managed to recruit him, which spelled for a terrible defeat should their armies meet head on. That creature of chaos was in a league of its own, able to escape from the most defended location in the Solar Empire in mere moments. She called to her chief general.

"Send this message to all forces in the Solar Empire. I want all guards in the smaller villages to pull out and to head towards the closest city and aid in its fortification." The pony nodded before rushing off to deliver the message.

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Zhufor The Impaler's POV

As I sat in my throne of skulls, bored out of my mind, a portal opened up right in front of me. And out of it stepped a being much like me, except Blue and with different gear style.

"Zhufor The Impaler of The World Eaters Legion. I was expecting it to be you. How have you been?" The being asked. I simply shrugged.

"Fine. But, who, pray tell, are you?" I asked, to which he chuckled.
"I am Ahriman The Exiled, Right Hand of The Princess of the Night, Lord Luna. I am also pledged to Tzeentch. I come bearing a message from the Princess herself." This piqued my interest. I sat up on my throne.

"What is this message?" I ask. He pulls out a note and begins reading.

"Zhufor the Impaler, I, Princess Luna, Ruler of the Lunar Republic and soon to be Ruler of Equestria, hereby ask for your assistance in defending our border from the Soldiers of the Solar Empire, led by Princess Celestia." He stopped, putting the paper down. "She wants you to aid her in the defence of our cities. You are free to kill any Solar Guards you spot." I walked up to him.

"I bet your all going off to fight in a big battle, eh? I want in this battle. If it has anything to do with making Old Sunbutt suffer, I want in. I will not be put on guard duty. Do you understand?" Ahriman nodded. "Send one of your own groups to patrol the border. I can easily compensate for them." I then took a closer look at him.
"Do I know you? You look familiar. Granted, I can't remember anything since waking up in the Hospital and getting attacked by Sunbutt herself, but you really do look familiar." I asked him, and he shook his head.
"Unfourtunately, I don't have my original memories. They are currently being suppressed by an unknown power. Instead, I have Another set of memories. Of Ahriman before I came to this world. But I agree. You look familiar as well. Perhaps we met somewhere in the past. Anyways, we best get back to Lady Luna's Base." With that, Ahriman opened up another portal, gesturing for me to enter. I nodded, and stepped through the portal. Ahriman followed soon after. A dark blue mare with a few splotches of black on her coat entered my view. She had an ethereal mane, like Celestia's, but the inside looked like a peice of the night sky was torn and shaped into hair. She also had a horn and wings, I noticed. I then started the greetings.

"So, you are Princess Luna, yes?" I asked her. She nodded. Suddenely, I lunged forward, grabbing her by the horn.

"I will go on this mission of yours, you hear? I will NOT do Fucking border patrol. I want to make Celestia suffer for trying to turn me to stone." She gulped, and nodded, and I then released her horn. I then noticed that all had gone quiet as ever pony, as well as Ahriman, was glaring at me. I raised my arms in exaggeration.
"What? Don't you know how a World Eater Chaos Marine makes a deal? I tend not to take no for an answer." They slightly relaxed their glare, and after a few moments, returned to work. I looked back at Ahriman.

"I will not allow you to harm her majesty in any way, shape or form." He told me, then whispered into my mind.
"It's all part of Lord Tzeentch's Plan for her continued survival." I looked at him, snorted, then walked off. He grabbed my shoulder.
"Wait. There is all so another World Eater in service to Luna, or so the reports and rumors suggest." I stop in my tracks, and turn to look at him.

"Where is this World Eater? I would like to speak with him." I asked, trying to be polite.
"He will be here in two days time. Best to wait for his arrival." He answered, and I sighed in defeat before nodding. He clapped my shoulder. "Attaboy. Now, let's go discuss where you will be during the assault." I followed after him, almost hungry to fight Celestia's soldiers. I also heard a voice in my head, repeating the same words over and over:'Kill Maim burn kill maim burn.

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Two days later.
Khârn's POV

When my Company arrived, we were greeted with warn smiles and pats on the back for a good job. After all, my Company had been raiding most of the gear from the Empire and giving it to the Lunar Republic soldiers for quite some time now. I turned back to my Company.

"Alright, brothers and sisters, we have an hour or two before the inspection. That is your time to visit family, friends, and relatives. Dismissed!" I order, and they salute me before breaking off into the crowd. I sigh, then turn towards the Palace that Princess Luna and Ahriman were currently using as a base.

"Ahriman.... is it possible? Is it actually you?" I asked myself, before walking towards the main gate. The guards cross their spears, blocking my path.

"State thy buisness, Marine." They said as one. I sighed.

"I am Khârn The Betrayer, soldier of the Lunar Republic, and current commanding officer of the 35th Company." I told them. They eyed me warily, but still let me through. I walked up to a random house servant.

"Excuse me, but where is Librarian Ahriman?" I asked. She looked up at me, contained a squeak, then pointed in the direction of what appeared to be a Library. I facepalmed.

"Curse your Damn humor. Of course a Psyker Librarian would live in a library." I thanked the house servant, then walked up to the Library, the sound of said doors echoing throughout the small library.

"Ahriman? Are you there?" I called out. No answer. Just as I turned to leave, a hand grabbed my shoulderpad. I whirled around, my fist almost making contact with Ahriman's armored face. I managed to stop myself before connecting the blow, though Ahriman just stood there, unfazed.
"Khârn the Betrayer. I thought it was you. Now the three Chaos Marines of this world have united. Before we start to converse, follow me to our brother." He turned around and walked down one of the aisles. I followed him, hoping the third marine was who I thought it was. He pressed a few buttons in the wall, and it slid open to reveal a staircase.

He calmly walked down the stairs, and I followed. When we got down to the bottom of said stairs, Zhufor was waiting for us.

"Well, if it isn't Khârn the Betrayer. Haven't seen you in a long while." Zhufor told me.

"Guys, it's so good to see you again. I thought I was the only one who got sent down the wormhole and into this war. " I said to them. They stared at me blankly.

"What wormhole?" Zhufor asked. Ahriman just sat there thinking back to his time entering this world.

"Seriously guys? Don't you remember who we were before being sent to Pony land?" I asked. They both looked at me as if I had suddenely grown a third arm.

"You can remember what happened before we were sent here?" Ahriman asked. That stopped me dead in my tracks.

"You guys... don't remember? The Convention, the two merchants, none of that?" I asked.
"I don't remember a thing since I woke up in the Solar Empire Hospital." Zhufor answered.
"Technically, I do have my memories, but they are being suppressed by an unknown power. I have the body and memories of Ahriman the Exiled, and remember nothing else since I came to Equestria. I take it you have your memories intact?" Ahriman replied, gazing at me intently. I nodded, speechless. He got up. "Please review what happened right before you got sent here in your mind. I will view it." I nodded, then thought back to the day of the Convention.

After a few minutes, Ahriman moves again.
"So, that's who I was before all of this...." He muttered to himself. I nodded. Then I saw how depressing the setting was. Time to change the subject!

"So, why are me and my Company here?" I asked. He looked up at me.
"Your Company? Since when did you take control of the 35th?" Ahriman asked.
"Since the last Commander died and appointed me as his successor." I replied, shrugging.
"I see. Anyways, to answer your other question, we are gathering the Might of the Lunar Republic's army together for the first time in centuries, and are preparing to take over manehattan. Afterwards, once the Solar Empire begins to run low on supplies, we will attack the Palace itself, and defeat Celestia once and for all, installing Luna as the new ruler of Equestria." Ahriman tells me. I nod, seeing the possibilities in that Plan.

"Well, I can tell you that you won't be dissapointed by the 35th. After being installed as leader, I personally trained them, and some even began to give their services to Lord Khorne. We have hardy group of Chaos Ponies ready for combat." I tell him. Ahriman nods in approval.
"Well, let's head to the meeting room, shall we?" Ahriman asks. I nod, and all three of us March to the meeting area, me following Ahriman and Zhufor since it was my first time here.

Author's Notes:

Welp, Tada! The first part of one of the biggest battles in My Equestria's history! I hope you enjoyed! By the by, next chapter, there will be Blood, gore, Deamons, and more! Stay tuned for more to come! Please point out any grammar errors and spelling errors!