In the vast universe, wherever the empire reaches, there are interstellar marines under the guidance of the emperor, silently guarding the well-being and peace of mankind.

These warriors surpass mortals in everything through genetic modification, psychological training, and unimaginably harsh training.

They are feared by their enemies and feared by those who are sheltered.

However, these warriors were few in number, and after the Great Rebellion, they became small warbands under the guidance of the Astarte Codex.

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A Space Marine warband usually has only about a thousand people, which makes it difficult for the Empire to launch a large-scale expedition with Space Marines as the main force like the Great Expedition.

However, since the regent Sivir led the empire, the empire's biotechnology has advanced by leaps and bounds.

A technique called gene seed purification has been developed, which can be used to isolate and improve genetic material. The experts of the empire used this technique to remove some of the defects in the genetic seeds and create even more powerful genetic seeds.

And the Empire's biologists and some of the Astarte apothecaries of the Space Marines have teamed up to create the Astarte Modification Procedure, which is safe for all humans to perform.

Coupled with the fact that the Empire's biotechnology allows the Empire to mass-produce genetic seeds, the Empire is fully equipped with the ability to massively expand the army of Space Marines.

Therefore, when the Empire launched an all-out war against all the orcs in the galaxy, under Sivir's orders, the number of Space Marines in the Human Empire suddenly increased by more than ten times, and the Star Marine Legion was reorganized.

But Sivir had to redefine a new set of norms for the Space Marine Corps, as the organizational structure of the Space Marine Corps during the Great Expedition was very chaotic in the past.

For example, the First Army has three systems at the same time, that is, three chains of command. Each of these three systems has its own complete vertical structure.

Each of the First Legion's Space Marines belongs to at least one or two systems. And his position in each system is often different. In other words, his subordinates may still be his superiors.

Moreover, during the Great Expedition, many legions were completely different from other legions due to the quirks and preferences of the original body.

For example, the death guard is divided into seven Dalian. Theoretically, each company has about "seventy" thousand Space Marines.

In other words, the number of Death Guard troops is about 490,000 Astarte, but in fact, the strength of the Death Guard has never come close to this number.

But Motarian, who has a twisted personality, just has to make such a formation.

And the other one who uses Dalian is the Space Wolf Legion, who divides the legion into thirteen Dalian. However, there is a huge difference in the number of people in Dalian, some are nearly 1,000, and some are more than 10,000.

In addition to these legions, the Thousand Sons Legion is divided into nine societies, which are further divided into academic rings. And the number of academic rings in each society is like the number of classmates themselves, and it is deliberately different for some purpose.

The White Scars have tribal formations, and these tribes are irregular in number. There are also warbands, ranging in number from 5,000 to 20,000. Then below are the fraternity formations, which also vary greatly in size from hundreds to thousands.

What else is there to divide the legion into hundreds of companies and use the Holy Blood Angel managed by the Triple Celestial Sphere system. Unit numbers and coats of arms can be exchanged, changed and adjusted at any time, and the alpha of personnel and resources can be redistributed at any time, etc.

Even the Ultramarines led by Kiriman seem to have the same size as the warbands required by the Astarte Codex, but they have expanded tenfold. For example, the company establishment of the Ultramarines Legion is 1,000 people, and the warband is 10,000 people.

However, in addition to the traditional combat sequences, the Ultramarines also have some unique formations that are independent of their basic structures.

The organization of the various legions is chaotic, and there are almost no similarities.

Such a chaotic formation would of course have a serious impact on the military operations of the entire empire.

As in many operations during the Great Expedition, the Empire had problems correctly classifying the White Scar detachments, both in terms of supplies and in correctly assessing the threat level of the opposing army.

In one world, two White Scar tribes were sent to eradicate rebellious human enclaves, and the Great Expedition Logistics Division provided them with the ammunition and supplies needed by the two standard Astarte warbands, only to find that the supplies could not meet the needs of the two oversized tribes sent by the White Scar Legion.

In another incident, a large Ultramarines task force besieging the Alien stronghold asked the Empire to send a similarly sized Astarte Legion force for reinforcements, but the strategists of the War Department mistakenly assigned the nearby White Scar Tribe, which numbered only half the size of the Ultramarines, to participate in the conflict.

In Sivel's vision, there could be hundreds of legions in the service of the Empire in the future.

In the Beast Army alone, the Empire has formed fifty-three legions of Space Marines.

If each legion had a different formation, it would mean fifty-three different legions.

It will be difficult for the military department to assign tasks to these different units, and the logistics department will not be able to provide the troops with the necessary materials on time and accurately because of the complex organization.

Therefore, just like when Sivir was on the planet "Orunki", he innovated and made the Sacred Word 2.0. When forming the Legion, Sivir innovated the formation of the Ultramarines and created the Astarte Codex 2.0.

Kiliman's Astarte Tome of Warband construction is outdated, and it is now the era of Sivir's Astarte Tome of Command.

According to the Astarte Codex, the Star Marine Corps is organized as follows:

Corps.

It consists of several warbands, space fleets, mortal auxiliaries, and legion support units.

There should be senior Legion Staff, Legion Delegates, Honorary Guards (Flag Bearers, Praetorian Guards, etc.), Legion Ordnance Department, Legion Pharmacy Department, Legion Retreat (Chaplain), Legion Think Tank Association, etc.

Warband.

It consists of several companies, a space fleet. It is composed of corps armored detachments, planetary assault fleets, gunboat fleets, support artillery teams, etc.

There should be a war group headquarters, war group deliberative representatives, war group honorary guards, war group headquarters guards and other departments.

Company.

It is composed of several squads and squads. There are gunboat squadrons, super-heavy vehicle squadrons, support artillery squadrons, dreadnought mecha squadrons, technical sergeant detachments, pharmacist detachments, etc.

There should be a company headquarters, a company headquarters and an honor guard and other departments.

Team.

Ranging from five to a hundred, several squads usually fight in groups. According to the mission, equipment and organization, it can be divided into destroyer squad, tactical squad, heavy fire support squad, reconnaissance squad, etc.

The Astarte Codex, compiled by Sivir, laid the foundation for the future military system of the Space Marine Corps.

But this is only a suggestion, and it only dictates the organization of the Space Marine Corps. There are not too many tactical requirements for equipment, so there can be many differences between different legions.

Like the Thirty-Ninth Legion, the "Eagles of Doom" led by Karni, it has many times more air units than the Standard Legion.

The Star Marines of its legion soar through the skies in aerial vehicles, like eagles that bring destruction to their enemies.

And the second wargroup of the "Eagles of Destruction" stationed in a city somewhere on the Long River Star was even given the title of "Eagles of Death" within the warband.

In contrast to the First Band, which has a large number of Terminators and Assault Boats, and mainly uses teleportation and quick assault to jump gangs and parachutes, Second Band's battles are usually fought in the air.

They are the deadliest of the Grim Reaper of the Skies.

When the 2nd Combat Regiment stationed near the city received a request for help, it immediately sent troops to support.

A squadron of Thunderhawks, which was patrolling in the air, arrived at the battlefield first.

At this time, the battlefield was already in chaos, and a steady stream of insect swarms were pouring out of the underground passages, fighting with the soldiers of the Empire, and it was difficult to distinguish between them.

The larger giant creatures are trying to destroy the defenses of the Empire, constantly moving forward, and any creature that stands in its way will be ruthlessly torn apart.

The sheer number of Tyranid creatures made it impossible for the Thunderhawk Gunship to use the high-powered weapons on its fuselage and the cluster bombs it was carrying to clear an area for landing, which would soon be filled up again.

And just as the pilot of the Thunderhawk was trying to find a safe place, the Tyranid air units in the sky that were fighting with the Empire's fighter jets and gunboats for air supremacy gradually approached him.

"Mind you, the aerial swarm is approaching. Begin to evade maneuvers. ”

Thunderhawk's engines roared to maximum power, and the pilot switched views between the exterior shots of the ship until he saw a swarm of black shapes shaped like sentient smoke approaching them.

The aerial swarm transposes and moves as a unit. In the course of their precise flight, it is easy to see them as one living being, rather than many.

The gunboats easily shook off the swarms, but others appeared in the other direction, trying to catch them like open hands.

Thunderhawk's weapons fired, but their ammo was nowhere near enough to take on so many Tyranid creatures.

"Lower the height, open the ramp."

The Space Marine sergeant behind the Thunderhawk transport pod opened his mouth and gave orders to the pilot in the communication channel.

"But..."

"Open the ramp."

The rear attack ramp descends, sirens sound in the cabin, forming a ramp, while below is a sea of creatures ranging from animals no bigger than pests to behemoths the size of battle tanks.

But when the order was given, the Space Marines did not hesitate, disconnected their footsteps from the magnetic connection on the deck, and leaped from the sky.

Leaning on the powered jetpack on their backs, hundreds of Space Marines landed in one place, and the Tyranids on the ground spotted them and gathered towards their landing point.

Of course, the Empire's Astral Army also saw the arrival of support, and their morale suddenly became high.

The Space Marines descended from the sky like killing machines made of steel, plunging into the tide of massive aliens.

While hundreds of Space Marines aren't enough to make or break the war, they're just a vanguard force.

In just a few minutes, a flock of Stormbirds, specially guarded by gunboats and fighter jets, arrived on the battlefield.

Although these Stormbirds are slower than the Thunderhawk, they are larger and can transport more Space Marines and heavy vehicles.

Its huge engine crew brings a very unique and extremely large roar, and this huge roar can be heard clearly even on the battlefield under fire.

Combined with its ferocious firepower and clumsy but heavy appearance, it used to be known as the "Death Bird" among the mortal auxiliaries of the Great Expedition.

Unlike Thunderhawk, facing the sea of worms composed of many Tyranid creatures on the ground, Stormbird chose to force a landing field directly against the attack of Tyranid creatures.

Its five omnidirectional automatic turrets around the fuselage fired non-stop, firing at the Tyranid creatures in the landing area.

And in the face of the counterattack of those Tyranid creatures, the stormbirds did not dodge or dodge, and let them attack.

Its armor layer and base structure are made of special high-density materials, and its armor is thicker and heavier than that of a main battle tank. Not to mention that it also has a Void Shield with incredible defense.

The Tyranid Creature's attack didn't even scratch off its armor coating.

Sitting in such an air transport vehicle is full of security.

It is no wonder that after the Legion was split up and the Stormbird was gradually replaced by the Thunderhawk, some of the starmarines who had served in the Legion always felt that this "little thing" under their ass could crash at any time when they rode the Thunderhawk. The heart is full of uneasiness.

As the heavy explosive bomb fired by the storm bird cleaned the Tyranid creatures on the ground, the heavy monster landed directly on the ground, and the Tyranid creatures that couldn't leave were directly crushed into pulp.

The hatch and tail ramp opened, and the Space Marines and Dreadnoughts quickly stepped out of them, clearing the surrounding Tyranid creatures that wanted to get closer.

After landing, the Stormbird can still use its various weapons systems to protect the landing force and provide fire support. At the same time, Storm Birds can transfer unused energy to their Void Shield for additional protection.

Its dual Void Shield generators on its back not only provide the Stormbird with exaggerated defense, but can even project shields to provide additional Void shield protection for disembarking infantry and vehicles.

These Storm Birds are not only high-capacity transport units, they can also be used as forts or firebases on the ground.

The gunboats and fighters that were guarding the arrival of the storm birds rushed at the Tyranid creatures circling in the sky, and the Tyranids on the battlefield gradually fell to the downside.

And in the rear, there are more transport vehicles carrying the Astral Army, as well as powerful armored groups rushing here. Other defensive lines and strongholds that were attacked by Tyranid creatures were also supported.

Today is by no means the beginning of the fall of the Long River Star.