Since the Majority is Ork Then they will battle the Ork First

"My Emperor the one who attacks are the Orks" Said the Soldier

Karl Franz Felt anger "Those Savages attack again? they will be punish for this" Said Karl "Summon the Army We will Aid them" He added as he go

"Perhaps we could an assistance Emperor Karl Franz" Said Guilliman

"It would be appreciate Prince Guilliman" said karl thankful for the offer to him

"Ronan do you want some Orks to kill?" Guilliman ask

Ronan Smirk "Yes" He said

"Then call your brothers for war" Said Guilliman

"Understood my Lord" Said Ronan as he begun to call them

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Ultramar's Honor

"Attention Mortals and Ultrasmurfs and Banana boys (Custodes)" Said Athena  Her Voice Boomed Throughout the Ship

All Ultramarines and Mortals stop their activities and listen to Athena

"Right... Now i have your Attention please listen" She said "Lord Guilliman and Commander Ronan" It is rare for Her to call them for their Name only when it is serious "That they Need Help" She said

"Who dares to attack our Primarch!?" Said Joshua in anger

"Apparently not, They Request Reinforcement for them to help the Empire's City that being siege by the greenskins" She said in Disgust  

"So to any Available Ultramarines you must go now and saved the City" said Athena

"Alright Brothers you hear our Friend A.I. Here?! let's reinforce this City and purge the Green skins" Said Nath

All of them Cheered

With it every available Ultramarine Goes to the Armory and while others goes to the Hanger due to them having already have a Full Gear

"Moved Brothers Go to your transports!" Shouted Chapter Master Lucius 

With It Some Dreadnoughs have been Awaken by the Tech Marines while still leaving the more powerful model to sleep as nothing strong threat to them

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Time skip

Guilliman Wait for the Others to Arrived

When they arrived Guilliman and Ronan Proceed to the Besiege City

20 minutes of Flying they arrived at the City they saw Ork have already breach the gate

that which is it the same orks as in their galaxy that which make the Ultramarine Angry

"Alright Brothers time to purge some green skins" said Nath as looked down

Then the Thunderhawks and Stormtalon and Stormraven Bombard them with payloads and bullets killing thousands of orks in the second 

While Other Transport Drop their passenger in the city

Ronan is in the outside of the city he saw the orks charging after them and the size of it he said to be the Nobz and others are black armored orks

"Purge the XONOS!" Shouted Ronan

He unsheath his Power sword and aimed his Plasma Pistol he overcharge it and fired killing dozens of orks

While his Brothers support him and other Melee Combatant Space marine

 He cut an ork into half with another 3 when he swings his sword

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Inside the City

While Nath is in the inside of the City killing Orks

"Die Savage!" said Nath as he slice the orks head 

The Imperial defenders and citizen are shock at their sudden appearance and their fighting prowess as they kill the Ork effortlessly

"What are you Looking at?" Said Nath "First to see an Ork being Butchered like an animal?" He added as he begun to kill another by his Bolter shooting to it's head then to it's spine killing it

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Outside the City

"Big Humie! i'z challege you!" Shouting the largest of the Orks measuring in 10 feet tall

Ronan Saw the Ork "Hm a Warboss good" said Ronan as he saw the Gunships still raining down to kill more and more orks

Ronan Run towards the Warboss as the Warboss have a Crude sword and shield followed by black armored orks

His Honor Guards and the assault marines charge against the  orks

The Assault Marines Jump at the orks while the Honor Guards that  have shields raise it

While Other fire their range weapons killing some of the black orks

Ronan Dueled with the Warboss and he could tell that the is surprise

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Inside the City

"S'tay stll humie!" Said a Black Ork as it tried hacking Nath but still dodging 

"Red is fasta!" He shouted

"Fuck off Savage" said Nath with the swing of his lighting claw he cut the ork to pieces "Blue is Faster!!" He shouted the top of his lungs 

While a Squad of Devastator Marines with Aggressor Squads Fired their Heavy weapons

Waved after Waved has been put down

To Those who are Near to Them they Find themselves being Punch by the Aggressors squads as it Send Them flying and with it's force crashing other orks who are in their paths

"Keep Firing Brothers" Said the Devastator Sargent as he cut another Ork with his Chainsword while firing his bolt pistol 

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Outside of the City

While fighting the Warboss Ronan Notice some Creature as well other Ultramarines and Custodies

A Troll

And a Giant

"These Creatures are hard to kill" said an Tactical Marine as he dodge from the Troll as he saw it wounds heal from slashes but not a Large Hole 

"Be advice Brothers These creatures with hammer have a Healing capacity small slashes or minor to major wound healed them unless fatal" He said

"Copy that Brother" Said a Captain

Guilliman have joined the Fight killing dozens upon dozens of orks with his sword but it did not ignite 

He cut another ork with his blinding speed he saw a Giant smash it's club to him Guilliman catch it with his free hand as he sheath his sword the giant struggle against the strength of Guilliman then he pulled the Giant towards him with striking distance he punch the giant's head destroying it

"How did this orks even able to tame them?" Though Guilliman

Then an Ultramarine Wielding a flamer burn a Troll and it much more effective as they burn quickly "Brothers This Creature called Trolls have a Weakness of fire" He said

"Good another way to defeat them" Said Guilliman

Ronan dodge another sword from the warboss this time Ronan swing his Sword the Warboss attempt to shield itself but Ronan Sword cut through it through it's head and killing it

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Inside of the City

Nath Killed the last Ork by stomping it to death

"The City is clear of the orks" said Nath

"Good" said Guilliman 

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Outside of the city

The Orks Retreat but the gunships did not let them as they killed them all 

with it the Battle is over

One of the Defenders of the City Approach them

"Thank you for helping us Stranger" Said the Man with Knight Armor 

"It's nothing we just purge these Savages" said Nath

"These Orks have been Troubled us for the last thousands of year" He said in Anger

"I Feel ya my friend" Said Nath

"Sorry if this is Rude... What Faction are you?" He ask

"We are the Ultramarines" said Nath as he go

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Aldorf 

While other Ultramarines have Returned to Ultramar's Honor

Guilliman Returned to Aldorf

"Thank Prince Guilliman We have in dept to you" said Karl 

"Your welcome Emperor Karl Franz" said Guilliman

"So are you still planning to go and explore?" Karl Franz Ask

"Yes" Said Guilliman

"Then i wish a Good fortune for you my friend" Said Karl as He and Guilliman Bow to each other

"Alright Let's Return to Ultramar's Honor" said Guilliman as he moved towards the Thunderhawk and Returned to Ultramar's Honor

Their First Action will be spread around the world with it they will not underestimate them But Chaos will move in time

Rumors will spread of their Action to this Day

Dark Elves will be Cautions to them

Wood Elves Did not Care as long as they are not trespass into their territory 

The Empire are Thankful for this and build friendship with Guilliman and Karl Franz

The Dwarfs will soon be impressed to the Technology from the Ultramarines

Britonnia will one day Talk with the Ultramarines

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And Done

Their First Battle and they Won in this World

The Question which new location will they go

See you Next Time Folks