Imperium Secundus

## Military

### Military

9 trillion PDF, 9 trillion Guardsmen, 50 Titan Legions, 840 Chapters of Astartes (ten thousand strong)

## Known Relations

### Allies

Tau Empire (Deep Alliance), Empire of Ashes (Allies), Grand Conclave (Founding Member)

### Enemies

Destoyer (War of annihilation), Orks (War), Chaos (War),

The Imperium Secundus is one of the most powerful of the Imperial Remanents and the most powerful of the Astartes Protectorates that formed after the Death of the Emperor. Where most Astartes Protectorates were formed by circumstances the Imperium Secundus was formed due to a contingency plan Roboute Guilliman left in case of the Fall of the Imperium. This plan resulted in every Ultramarines Successor within thousands of Light years of Ultramar uniting under the command of the Chapter Master of the Ultramarines after the Death of the Emperor, allowing them to quickly form a large Imperial Successor state. For the following centuries the Imperium Secundus continued to grow under the stewardship of an every growing number of Astartes Chapters as first those Chapters initially represented by a single company or even squad were brought to full strength and later new Chapters of Astartes were founded.

This period of growth ended when the Imperium Secundus came into conflict withe the Tau Empire, which had grow to be one of the most powerful forces in the Segmentum since the Death of the Emperor. The war with the Tau Empire soon turned into a desperate fight for survival, with the heroes of the Astartes being bought down by the technological advantages and sheer numbers that the Tau can deploy even as the Tau were forced to deploy an ever greater portion of their forces into the meat grinder that the war had become. Eventually after an Ork Domain ignored by both sides due to their preoccupation with each other tore a path though both polities the Cyhtheria Conventions were formed between the Imperium Secundus and the Tau Empire, to limit the scope of their wars and prevent them every being rendered weak by them again. Since then the Imeprium Secundus and the Tau Empire have alternated between fighting each other and uniting to deal with mutual threats, such as the rise of the Beast.

The Imperium Secundus is the largest of the Imperial Remnants, covering almost a hundred and eighty sectors on the eastern fringe of the galaxy. These worlds are all highly fortified, using a mix of Imperial technology and technological secrets found by the study of Tau technology over the centuries.

The Imeprium Secundus is ruled entirely by the Adeptus Astartes under a relatively complex system that gives each chapter a both great deal of independence and strict limits. The chapters of the Imperium Secundus are split into Guardian and Crusading Chapters, each of which have their own rights and responsibilities. Each sector has two Guardian Chapters whose primary duty is to rule over and defend their sector, and recruit entirely from within the sector. At any one time one of the Guardian Chapters will be tasked with administering the sector and defending its worlds from assault while the other Guardian Chapter is tasked with seeking out and combating threats to the chapter, both near and far. The Chapters will maintain their responsibilities for a century before switching, so that no chapter gets complacent. Guardian Chapters will be supported in these efforts by the fleets and PDFs of the worlds in their sector. Crusading Chapters are tasked with furthering the interests of the Imperium Secundus as a whole and can recruit from any world barring the homeworlds of other chapters, though many of them recruit primarily from their own chapter homeworld. It is the crusading chapters which provide the bulk of the Astartes for the Imperium Secundus' armies and deal with the majority of the threats on the borders. Each Crusading Chapter is supported by a force of regular human sworn to their service that is recruited from among the best mortal soldiers in the Imperium Secundus and number in the billions. The final force in the Imperium Secundus is the Imperator Regis and the forces sworn directly to him. These forces include around a third of the Imperium Secundus' guard armies and fleets, as well as one company from each Chapter within the Imperium Secundus. They form the core of the Imperium Secundus' major deployments and are most often deployed against the Tau Empire and other major powers.

The Imeprium Secundus is led by the Imperator Regis, a leader chosen by the Council of Chapters, a council formed by the Chapter Masters of the Imperium Secundus, from among their numbers to act as their leader until his death or dismissal. So far no Imperator Regis has been dismissed, an act that requires the support of two thirds of the Council of Chapters and is only to be carried out in the case of gross incompetence or treason. The Imperator Regis has many rights and responsibilities, directing the Imperium Secundus as a whole, though individual chapters still have a good amount of independence.

The Adeptus Mechancius in the Imperium Secundus is distinctly subordinate to the Adeptus Astartes and lacks the power or unity that it has in most Imperial Remnants. However it is still a powerful force, though one that has changed greatly since the Fall of the Imperium. The biggest single change is that due to desperation to counter the Tau Empire's growing technological advantage the Adeptus Mechancius of the Imperium Secundus is not only willing to study xenotech but has based a great deal of their own technology off designs created from studying Tau technology.

The Imperium Secundus is one of the greatest bastions of the sane in the galaxy, and has a strange but strong relationship with one of the others. As result of its efforts and those of its honorable foe the Tau Empire the Eastern Fringe is one of the most stable regions in the galaxy, a shining beacon of hope in these dark times.

In war the Imperium Secundus fights in many ways like the Adeptus Astartes of the Imperium did when they were given control over other Imperial forces. They generally use their mortal soldiers to pin enemies in place in order to allow elite Astartes strike forces to deal critical blows. After an enemy has been crippled by repeated Astartes attacks the regular forces will be able to achieve victory. While these tactics make it seem as if the regualr forces of the Imperium Secundus are little more then fodder this could not be further from the Truth. The PDF and Guardsmen of the Imeprium Secundus are a highly trained force equipped with advanced weapons and armour reverse engineered from the Tau Empire that are able to match most foes blow for blow while the Astartes carry out their missions.

In recent years, facing the threat of the C'tan called The Destroyer, the Imperium Secundus was forced to join officially join forces with the Tau Empire, forming an alliance called the Ultima Compact. Despite that, they were being driven back, and, barring a miracle, were expected to be annihilated within a few centuries at best. After the defeat of the enemy by a combined force of both the older and the younger races, it seemed that they might finally be safe, but soon after, the Deceiver executed his long-running plans, both taking over the Destroyer's remaining forces and subverting a large portion of the alliance's population. While the Krork arrived in time to save them from complete annihilation, by the time the Deceiver was forced to flee, the once mighty Compact was reduced to a mere dozen sectors, with about a hundred more scattered around and in a position to reintegrated if given the time.