Previously 

With it, Ronan Smiled at her Softly "There is, but it's Rare, Remember this Usagi, this Space Marines and Thunder Warriors are Ready to Sacrifice themselves for you should you Order to them even without it, Their Love for you not as an Empress but as their Grandmother is very strong to the Point their Death would be Nothing compared to you if you Ever Get Hurt

Last time it did well an Entire Species Went Extinct" Said Ronan "And they are Immortals they would only Die in Battle, no Ifs and Buts, they would Die in Battle for Only in Death Does Duty Ends"

Usagi Sight in Relief but she is still Sad to Hear it that her sons and Grandsons are Immortal as herself, that Means they will Suffer to See their Friends and Brother to Die

"Hope you won't be Jealous Little Rini, Some of these Primarchs would be Far Better as the Heir of the Moon Kingdom because some of them could Rule Multiple Planets, the Eldest has 250,000 Worlds, while the 13th Roboute Guilliman have 50,000 Worlds, Once they have fewer worlds but now it Expanded" Said Ronan

Rini was shock to hear this "It appears someone could at least have a Better Job than me then" Said Rini in Sadness yes she knows that she is 900 years Old but she still has a Mentality of a Child, but seeing her Brothers just for once she could tell that they seen far more Horror in their Lives than she will ever be in her Entire Life

"Next we would watch Horus" Said Ronan

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Present

"Horus? Who is Horus?" said Usagi

"One of your Sons of course" Said Ronan "The One who Struck the Down the Emperor, the One who Leads the Civil War against the Emperor, the One who leads other 9 Legions against the Emperor, He is Horus Lupercal Warmaster of the Imperium 2nd only to Ronan when it comes to Fame and Power and Favorite of the Emperor, he is also known as the arch Traitor, The 16th Primarch, The Slayer of the Angel, the Conqueror of Worlds and the Warmaster of Chaos after he Turned against his Parents"

Silence Reign in the Room as they are shock to the titles "Are we gonna see one of Usagi's Sons?" Said Rei with stutter as she is Nervous as they are really going to see one  of Usagi's Sons in the Future

"Yep Indeed, You will meet Ronan's 2nd, the Warmaster himself" Said Ronan as he Nod "Though Unlike Ronan being the Crown Prince of the Imperium, High King of the Realm of Primordia, Horus was only given the Command the Entire Command to the Imperium's Military and only Above him is the Emperor, Empress and Ronan in Terms of Authority"

"It's still quite hard to Imagined for Usagi to Command an Army Let alone us" Said the Sailor Scouts minus Usagi in a Deadpanned Expression

"Hey i can be a Leader to you know!" Said Usagi with a Tick Mark on her head

"No" They all said

"How Rude of you guys, i though you are my Friend!" Said Usagi as she Comically Cries at them

With it the Group Turns to watch the Screen

https://youtu.be/Cj3ENSVogTo

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The scene showed in the Battlefield as there is a Many Dead Space Marines soon a Huge Boot march past the Bodies of the Imperial Fist and the Sons of Horus as the Camera Slowly Move up to the Face of Horus, he is wearing Dark armor with several Skull on it, with a Huge Eye on the chest of his Terminator Armor

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"Who is that?" Said Usagi as she point her Finger to Horus as she had a Bad Feeling to even asking that kind of Question Dreading for the right Answer

"That's Horus my Dear" Said Ronan with a smile "Horus Lupercal Primarch of the 16th Legion and Warmaster of Chaos"

another Silence in the Room as they now Finally saw one of Usagi's Sons

"That's brother Horus?" Said Rini with Fear on her Eyes even looking at his Face, she could tell that he is Intense, Wrath and Hate

This is her Younger Brother? it's hard to Imagined it when they looked like more conqueror contrast to her Mother who is Very Gentle and Pacifist and it's even harder to believe that her Mother would marry such a Man to Birth Such Sons

"Why does that Space Marine's Back Pack all black?" Said Ami as she notice one marine have black back pack

"You have a Good Eye Ami-chan" Said Ronan "Those Space Marines are the Imperial Fist's first Company Marines, they are the Elite Company of the Legion" he explained "They called themselves Templars"

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"I Never wanted this.... I Never Wanted to unleash my Legion" Said Horus as the camera looks up to see the face of Horus as well his Claws and the Mace 

as soon his Face appeared he is a Bald Man with Numerous Tubes on his Head 

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"He sounds angry and betrayed" Said Mina in Sad Tone at the Man

"He appears he doesn't even wants to unleash his Sons, my Grandsons" Said Usagi, she felt the Voice of her Future Son, his Voice is being Hurt and Tired of War that he was unleash upon on

"You said that he is the 2nd Favorite right along with his Legion being the 2nd Popular of all the Legions?" Said Michiru as Ronan Nod "Then why Betrayed him?" She ask

"Let's just Say the Chaos gods are Being Worried about their Progress, after one such Battle One of Horus Sons have begged to saved him and for something Warp Craft they are able to made him Change, as for Ronan he is Uncorruptable  to the Core since his Hatred to Chaos was Indomitable and for that he cannot be Sway by any Means" Said Ronan

"His weapons are Claw and Mace... Fitting weapons of Destruction" Said Hotaro she then looked to Rini "Rini-chan are you Okay?" She ask Worried

Rini shook her head "No... by... by Looking at the Claw i felt some bad Omens by Even looking at it as if it Not just meant to Kill, it's something that would send a Messege to anyone who would see him killing someone" Said Rini as she Shuddered by even looking at the Mere Sight of the Claws as if she has been Impaled by it as Hotaru comfort her

"I Feel it too" Said Usagi as she shuddered as well, Darien Went to her and Comfort her 

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"Together we banish the Ignorance of the Old Night"

Horus keep marching Forward  as a Lone Imperial Fist Centurian Stands he was clearly have only one arm left

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"oh No Please Don't you fool don't!" Usagi Yell for unknown Reason it was more Resonably Instinct Since considering these Space Marines and Thunder Warriors are her Grandsons and doesn't wish for them to be Killed

"Too late, they are Stubborn" Said Ronan as he looked at their Distress 

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The Centurian Turned seeing Horus he attack Horus With his Gladious only to be blocked by his Talons, Horus Din't looked even Impressed as he tossed the Gladious as soon as he Catch it and then Impaled  the centurian through his Chest as the Claws Easily Pierce his armor killing him instantly

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The Girls yelp and Cover their Mouths as they saw how Horus Easily Killed a Space Marine by just simply Impaled his Claw to the Space Marine

Usagi could Feel her Heart broke of seeing such the Death of her Grandson being Killed so easily and so.... Pathetic in the Eyes of her Son, he killed his Nephew who din't even bat an Eye at his Death 

"Poor Guy" Said Lita as she Cringe at his Death

"Still he Fights even though he knows that he is going to die, whatever it is, i think death is not even would make them Fear" Said Haruka

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"But you Betrayed me..." Said Horus as he Resumed to march as he even Drugged the Dead Centurian "You Betrayed us all"

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"What does he Mean we Betrayed them?" Said Usagi as she Dread that she might have done something that made them Hostile to her and to her New Husband

"Let's just say, as Horus Lay Mortally Wounded, while he was being Saved he saw a Vision of what will the Primarchs fate after the Great Crusade and it din't even help matters when you and your Husband have keep Secrets from your Sons" Said Ronan

"I keep a Secret from them?" Said Usagi

Ronan nod "A Dangerous Secret, Only the Eldest among the Primarchs knows it, along with Magnus who have small Knowledge of the Secret because for some bright reason between the two of you, you Let your Sons to Continue the Crusade and  with it, your Sons Feeling that they are abandoned by the Emperor and you, well at least you made some Effort to be with them when they Needed it the most, but it was already too Late for you Usagi to Saved their Souls from Chaos" Said Ronan

"Hell you are even lucky that the Eldest din't even Turned against you" Said Ronan

"Eh why?" Said Rei

"Let's just say He and Usagi had such a Legendary Hatred between to each other to such that their Fights are Common, you know you two have a Tendency to fight to the Death" Said Ronan

Usagi was Horrified at Hearing this "WHAT?! HOW CAN I BE FIGHTING MY SON LEST I HATE THEM?!" Said Usagi being Horrified and Hurt to be that she hates her Sons

"Well let's just say that you and the Emperor During the Early years in the Great Crusade you two are Shitty Parents you know, and Ronan whom have served the two of you during the Unification Wars and you don't even Pretend not to Hate him, you just simply being Called him a Tool a Weapon and not even Treating them as sons, that which is a Miracle because if Ronan Decided to Rebel you'll bet all of his Brothers would instantly Join him against the two of you because of your Treatment to them" Said Ronan

"And if he did, hell You would likely have lose by now" He added

Usagi begun to form tears in her Eyes, even Rini looked Saddened

"Am i that Lucky not to be treated that way?" Though of Rini as she had Recall of how much Patient her Parents have to Her and not to Mention they are never Mean to her, guess that she was really a Brat a Spoiled Brat to them as she is getting used to be Treated as a Princess  and all any Child could dream of and for that she was the luckiest Person in Earth

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More on both Side as Horus March "You stole power from the gods and lied to your sons!" Said Horus as he stop at the cliff

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They looked at Ronan "The Emperor for some Whatever Reason he ventured to the Realm of Chaos he gain Power from there either he made a Bargain or steal or Both, the outcome is he gain Immense Power after he exit from the warp" Said Ronan

"And What did he do?" Said Darien

"i'll tell you Later" Said Ronan

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Horus Lifted and Looked at the Dead Centurian before tossed him to the ground "Mankind has only one chance to prosper... if you will not seize it... then I WILL!" Said Horus

as the screen change to a Battle as Titans and Space Marines of Enormous Magnitude of death and Destruction as Horus Watch the Devastation of his Sons are Committing against the Sons of his Brother

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The Group looked in shock yet again along with such Horror on their Expression as this is a Battle than no Living on Earth has Ever Seen, to them all Wars on Earth are pale in Comparison to this one Battle

"Oh now what kind of War are we even watching!" Said Rei in shock as she cover her Mouth

"Nah, that's just one of Many Battles that are Faught my Dear" Said Ronan

"Are you saying this is just a Single battle?!" Said Rini Being the Only Person who doesn't know what a War Means is, the Scouts themselves have at least have a Knowledge of what War is as some of them read history

For a Girl like her to witness such things would be even far Worse than the Scouts, even though they are watching the 1st Glimpse of what a war in the future us

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The Scene Change as both the Imperial fist and the Sons of Horus are charging towards Each others firing their Bolters killing both Sides as the Warlords begun to fire their Volcano cannon towards Each other 

Tanks Rolled to Join the Fray

"So let it be War!" Said Horus

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War such a Simple Word came out from horus with such Dread to the Scouts 

"To think that, those Space Marines are my Grandsons Killing Each other with such Hatred, i would never understand of why they hate so much to the Point they are willing to kill their Cousins" Said Usagi as Tears fall from her Eyes

"oh Nephews" She may never have met them, but she still felt Hurt to see her Nephews Killing Each other with no Remorse, her Tears also Fall "If i was there, then could i even stop such Madness?" Her Though 

"If this is just a Single Battle, then i would Rather not Imagine of what Their Wars Looks like" Said Setsuna being Dreadful to the Future as Far as she could see, only the Future ruling of the Crystal Tokyo and that's that and nothing more that she could watch even to the Future

"He did say-- -the Fu---ture t-th-er-e-- there is on--ly war" Said Hotaro in a stutter because even seeing this Battle for the first time, she feels this are just one of the Many, though she maybe the Sailor Guardian of Saturn she is Death and Destruction but to see such Things as This was even Too much for the Likes of her

Even Rei, sailor Guardian of Mars, the Roman god of War, she feels this kind of Title was kind of Dread to her since it was Related to War

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Scene Change into another Planet where a Imperial Fist and Sons of Horus Preators charge as their Blades Clash to each other as both of them Glared with such Hatred to each other

Another Scene Change as One of the Marine in the Sons of Horus March, Then the Imperial fist who are attacking as they supported by the Warlord titans whom fired it's Gatling Gun along with launching missiles

Next back to the Ruined City as the Sicarian Tank advance and Rapidly Firing it's main weapon as Large Group of Chaos Marines taking cover from it

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"Ho--- How many Worlds" Mina ask in Horror 

"Hmmm, it would be thousands of Worlds all are Massacred with no Remorse, some of them are even conquered by Horus himself" Said Ronan

"That's Madness!" Said Hotaru with Terrified tone "This.... This Heresy, This is no Mere Civil War but a Heresy.... the Death must be in the Trillions"

"Correction 4.6 Trillion with Billions More coming in the Way, in all the span of 9 Terran years" Said Ronan

Silence again in the Room, just hearing than Many, and most of all, just 9 Years? it shudders them again of how Many Died with just 9 Years

"You have to Get used to it my Dears" Said Ronan as he looked More Specifically to Usagi "This was the Only time when Brothers fights Brothers, Space Marines against Space Marines, you will see more of your Grandsons killing each other more in the Future Usagi, now Feast the Deaths of your Grandsons and their Devastation of what Legion can do" He said with a Creepy Smile

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Scene Change inside of the Ship as Drop Pods  begins to Descend to the Planet of the Loyalist "From the Skies of Terra to the Galactic Rim" The Ship was Showed, this was the Vengeful Spirit Horus Flagship

as the Drop Pod hit the Ground, it Opened it's Ramps as the Chaos Marines Disembarked and fire their Weapons as they are in the Snowy area in the Planet

Chaos Centurian Kill a Imperial Fist with his Axe

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Lita Wince "It's hard to know if it's quick or not Considering this are Super Soldiers, then they are bound to Survive far Worse than a Normal Human" Said Lita as despite how they watch Space Marine Being Killed Easily there is still a Possibility that they can survive such Weapons since they are a Super Soldiers, who knows they may have some Healing Factor within their Biology

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2 Chaos Marines walk as one of them Plan the Flag in the Ground signaling their Victory against the Imperial Fist Legion

2 Chaos titan walked "Let the seas Boil!" a Planet was shown to be destroyed

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"So much Death and Destruction" Said Hotaru in sad Tone as Tear fall from her Eye

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"Let the Stars Fall" 2 Chaos Marine Officer Walked between the Formation of their Brothers

Then 2 Traitor Titans Marching towards the Imperial Lines as Missiles Hit them, but their Void Shields Block them

Within to the Cockpit of the Titan as the Princept seating on his Throne with the Moderati are assisting the Princept

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"That's a Princept, he is the one who controls the Titans" Said Ronan

"Titans? Are those the Robots are we looking now" Said Ami

"Correct, in Order to Move the Titan, the Princept have to Mind Impulse Unit  is a technologically complex device which is used to create a neurological interface between a mind and a type of machinery and control it with thought alone. The MIU allows the user to instinctively and intuitively control the machine he or she is connected to, as if it were an extension of their own bodies, or to absorb digital information directly into the cerebral cortex." Ronan Explained

"That Means in Short, that Titan that are Walking Right is the Princep themselves, as if they are walking with a 2nd Body" Said Ami

"That's Right Ami-chan" Ronan Praise her

"Though there is a Catch" Said Ronan "You see Every Titans have a Very Powerful Machine Spirit to the Point that they are Almost Fully Sentiant A.I. if they lose their Control or Perhaps Lose the Battle against the Machine Spirit then the Titan will be on Rampage"

"But why would they Even put such Pilots this Things if the Price was too High?" Said Ami

Ronan Shrugged at that "The Technology is Complicated in the Future Ami-chan, but one thing is for sure, if you Hit the Titan then" He let the words sink in

Ami Realize and Horrified "Then the Princep would Feel the Pain as if his or her Body was being Shot despite it was only the Titans that they are piloting being hit!" said Ami in Horrified tone as even the scouts looked in Horror

"Correct again" Said Ronan

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The Traitor Titan Fired both of it's Volcano Canon to the 2 Imperial Fist as it killed them instantly "Though all it takes the last drop of my blood!"

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"How could i even related to him? and along with his sons?" Said Rini as she looked away with Tears on her Eyes "His a Monster the---- They're all Monsters"

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The Scene Change

a Huge Battle was Fought as Titans, Tanks and Astertes Alike Firing all of their Weapons

as The Sons of Horus are Advancing more Drop Pods fall for reinforcement

An Imperial Fist Impaled the Traitor Marine with his Bayonet Though it's Neck entering to it's head

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"Brutal" Rei Cringe

"Please that's not even Brutal that's just a simple Child's Play to them" Said Ronan casually 

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The Scene backs to Horus who smash his Mace to the 3 Astertes and they are killed with a Single swing "I Will see the Galaxy Freed once more"

Horus Race his Mace towards the Vengeful Spirit fires down a Beam towards the Imperial Titan as it instantly destroyed

Horus Watch it with a smile with his Sons Stood Beside him along with the Titans and Tanks "If i cannot save it from your Failure Father and Mother... 

THEN LET THE GALAXY BURN!"

The Title Horus Heresy

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The Scene End

Usagi was the most Horrified at such a Declaration in her Future Son "He--- He can't just simply Declare to Burn the Galaxy just simply because of our Failure!" Said Usagi 

"He just did Usagi" Said Ronan "Your Son Declare it himself"

"Then where am i? Should i Try to even you know try to stop him?" Said Usagi

"You are busy Helping your Husband in Terra because of Magnus Broke through the Imperial Webway and with it Demons Invade, but they are being Held back the Forces of the Custodes and Sister of Silence themselves from Invading Terra" Said Ronan

"There's nothing you can do Usagi, you can only Trust the Remaining Loyalist Sons to Defend the Imperium" Said Ronan

"How Many?" Said Rini

"9 Traitors, and 10 Loyalist, 2 Loyalist Primarch Died, and 1 from the Traitor" Said Ronan

Usagi Gulped of hearing the Deaths of her Sons, she begun to Cry, the scouts comfort her

after Comforting her she ask "Who are the Grandsons of mine that Horus and his sons are Fighting?" Said Usagi as she wipe out her Tears

"They are the 7th Legion, the Imperial Fist, the Masters of Fortification, the Sons of Rogal Dorn" Said Ronan

"And?" Setsuna feels that there's more

"They're Father Rogal Doesn't lie, he is Blunt... Like Literally Honest himself to the Point he never truly Lie, hell he could not even understand Taunt or Compliment" Said Ronan

The Scouts Raise except Usagi who looked Confuse "Really?" They ask except Usagi

"Literally" Said Ronan

The Scouts looked at Usagi "Well It's hard to Believe that his her Son, because Usagi is bad at Lying and never that kind of blunt" They said in Unison

"Hey what's that Suppose to mean!" Said Usagi as her friends Giggled

Ronan chuckled at their Antics as he use some tricks so that they could at least Forgot the War in a Moment just so their Mind would still be Sane after watching such Future

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And done