Anyway, as you figure that out, I'll build the story for you. So basically the pre-Deluge World is totally unknown to the people of this Empire (story is set like 2000 years after the Deluge) but it exists mainly as myth which comes out of the direct aftermath of the Deluge. Earth managed to unite into two power blocs, but also managed to colonize the Moon and Mars, terraforming the latter (super important btw). At some point the two power blocs collided and basically plunged the world into chaos. Nuclear War, etc etc etc. Here is where the myth begins: A man arises from somewhere in the Italian Peninsula named Procas who unites the Aryan peoples of Europe. He is said to have been borne of the Sun and the Moon, and slays the Mad Bull in his youth. After uniting the Peninsular tribes, he pushes northward until finally winning a triumphal victory against the Insular Tribes. A Great Council in Gothenburg formalizes the Terran Empire, and crowns Procas as the first Universal Emperor. He and his descendants, although most of it is in the myth assigned to Procas, unite Terra (Earth) and are eventually contacted by the Martians, who have become a unified and martial society but are now like a distinct race (7 foot tall, copperish skin, etc).
Over the course of the centuries, Man (the Terrans) spread out across the Galaxy and colonize pretty much every world they can. By the time our roleplay starts, distinct ethnic groups exist who speak variations upon the Imperial Standard, although the courtly language is still High Terran (maybe something like Latin? Idk). Each ethnic group is kind of using like old-style names, which is just a personal stylistic choice of mine. Terrans, by and large, tend to use Roman-like names

tbh in this RP history diverged a lot
everywhere except Europe, Australia, and North America get fucked up
But regardless
the Terran Empire went through its cycle of Golden Age and is now entering a Dark Age
The old Emperor Ignatius died and his son, Honorius, who succeeded him was unwilling to really take the throne
He never really wanted to be Emperor but recognized that he had to
His brother, Prince Arnaud, Count of the Outer Stars, is really vengeful because he was his father's favorite
And insulted by his brother's lack of will to properly become Emperor, he rallies a bunch of noblemen and system sectors (including, most prominently, Alpha Centauri, the main planet of which is called Gelasia) in a rebellion
He secretly plans to usurp the Throne but as the rebellion went on, he turned it into a sort of Communistic Bolshevik sort of Revolution
to totally overthrow the Emperor and the institution of Empire
Honorius responds with force as he finally truly becomes "Emperor"
that was ten years ago
The Galaxy is a mess, the Empire is beginning to give way to the Rebellion, which I imagine is called the Free Galactic Revolutionary Council or something equally communistic
Our story takes place on Targus IV, a relatively insignificant planet in the grand scheme of the War
just a battle among other battles
But it binds the Adjutant and the Brigadier together to the end of the War
The Front is chaotic though so even though we're officers we'll be doing some fighting.

other worldbuilding stuff I guess is that Terra has been conquered
Mars has literally been destroyed
idk how else to describe it I guess but the entire Martian Race has been exterminated except those off-world
The Martians are feverently pro-Empire
The Imperial Court fled to Surya, a planet on the Outer Rim deep in Imperial Space
The Prince is basically rallying a bunch of disparate forces: rebellious barons and nobility who felt jilted by the centralized Imperial system, lower class slaves and serfs who joined the fray after being spurned on by promises of Republic, merchants who felt the pain of Imperial taxes and seek to dismantle the system under which they chafed
It's allegorical, really, to historical things
I guess, the eternal pull between Aristocracy and the Masses
The Rightful King and the Unlawful Usurper
The Empire is also pretty Pagan, religiously speaking
The Sun is considered to be the ultimate manifestation of the Godhead, of which the ultimate manifestation is the Galactic Core
The Galaxy spinning and rotating around it
they believe in Gods, holy men, as like the Romans and Germans did etc etc
do you have any lore questions?
In my head I viewed it a lot like the Crusade against the Cathars by the Romanists, the fall of the Third Reich, and the demise of Akhenaten's Empire

yeah basically imagine this Empire as being comprised of mostly European-types
who are, depending how you view it, organically assuming the rhymthic variation of Time back towards the names of their long-ago ancestors
or
LARPing as ancestors
Terrans are Romans, Martians are like Old Slavics
Panchalans are Frankish
Alpha Centaurians are more like closer-to-modern-day Frenchmen
for example Prince Arnaud's real name is Arnoldus Norbanus Antius
The Emperor's name being Honorius Norbanus Antius
but he changes his name to Arnaud because of his ties with Alpha Centauri, which is where he first raised his banner in rebellion
like i said the story i wrote was really mythological, grounded in esoteric symbolism
but this can be more of a straight-played military RP

Posted in quotes our discord discussions straight copy-pasted. If you wish I can write up some more elaborate lore. Moved the characters to Characters.

Sorry for lack of decorum!

Theuderic rode in the front seat of the armored car with his rifle hanging out the window...Theuderic could see the pride in his commander’s face as he looked up at the fighter bombers preparing to make their run on the enemy positions to their front.

Seeing his commander stand in the track commander’s hatch with confidence inspired him to know this would be a good day...

It appears our characters are in the same armored car charging into battle together based on what you wrote and your response.

<Snipped quote by Gunther>

You calling the Brigade 'CHILDEBRAND Brigade' reminded me of the German Kampfgruppen, and since we're working in that sort of "theme" I decided to have him call it that.

Also wanted to ask you what you thought of my concept on the Royal Panchalan Regiment being more along the lines of the large-style regiments of the British Army, with a lot of battalions organized under the basic Regimental structure, with Divisions being more for the Sectors? Like so we would have the 1st-90th Battalions under the RPR, which itself is under the Severacian Division, which itself is subordinate to the Army of the Sagittarius Arm.

I like the idea of there being towed anti-tank weapons, perhaps of a railgun-type variety.

As for the vehicles, I think sticking with the Germanic theme would be interesting.

What do you think of my concept as the Regiments being more organized like the British Army?

Click on the image for a larger more crips image.