How are successor chapters formed? Do Blood Angels just hand

>>52089684
Geneseed is tithed to the Adeptus Terra, who check it against the pure samples they already have to ensure it remains perfect. This geneseed is kept in stasis until it is needed, most often to replenish the stocks of chapters who suffer a disaster. Some can be held aside to create new chapters. This is usually done en masse as a Founding of new chapters to face a specific threat or to solve a specific problem. The Adeptus Terra decides whether a new chapter can be created and, if necessary, whether it needs to be destroyed (See Astral Claws and Soul Drinkers). Space Marines themselves generally shouldn't be involved in the process beyond providing officers for the new chapter.

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>>52089779
More specifically its the Adeptus Mechanicus taking the tithe and doing the technical work and the High Lords giving the final green light

>According to their charter, each Chapter is obliged to send 5% of its genetic material to the Adeptus Mechanicus on Mars. This 'tithe' has two purposes. Firstly, it enables the Adeptus Mechanicus to monitor the health of each Marine Chapter. Secondly, it enables the Adeptus Mechanicus to store gene-seed with a view to founding new Chapters.

>A new Chapter cannot be founded overnight. A single suitable gene-seed must be selected for each zygote. Zygotes are then grown in culture and implanted into human test-slaves. These test-slaves must be biologically compatible and free from mutation. Test-slaves spend their entire lives bound in static experimental capsules. Although conscious, they are completely immobile, serving as little more than mediums within which the various zygotes can develop. From the original slave come two progenoids, which are implanted within two more slaves, from which come four progenoids and so on. It takes about 55 years of constant reproduction to produce 1,000 healthy sets of organs. These must be officially sanctioned by the Master of Adeptus Mechanicus and then by the High Lords of Terra speaking for the Emperor. Only the Emperor can give permission for the creation of a new Chapter.

>>52089779
>Soul Drinkers
And they were fucking stupid for calling themselves that. They had it coming.

>>52090772
Leave the Soul Drinkers Alone!

Successor chapters are usually formed as part of a founding, or when there's considered a need for them. Very rarely (at least outside the second founding, which was the splitup of the original Legions) chapters are formed by splitting off from another chapter, like the Sons of Medusa.

Generally a parent chapter is chosen to provide some of their marines to make up the upper echelons of a new chapter. This is why some chapters are specified as being descendants of minor chapters, rather than just their overall genesire. It also ensures that the marines are trained and brought in line with the traditions of their parents, thought his may be affected by the personality of their founding officers.

>>52090090
Where is that from?

>>52089779
>>52090090
>>52091206
So basically

>Marines send out the special sauce
>TechnoFuckers test the sauce
>Chaos, Eldar, Tau, Dark Eldar, Necrons, or Tyranid Boiis come to play
>High Lords order a Number 9
>Start kidnapping and preparing Young Children to become marimes
>Parent chapter sends out a Chapter Master and Trainers to Terra
>Daddy Marines come to see their kids, fully grown and train them
>They go out to fuck faces

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>>52091340
Pretty much, yeah. It takes a hell of a long time to develop though, because apart from creating all the new Marines they've also got to build or requisition all the armour, weapons, ammunition, vehicles, space ships for the new chapter as well as recruit and train all the support staff, serfs and specialists like navigators, astropaths and techpriests they'll need for anything that isn't directly involved in murdering people.

>>52091262
Index Astartes: Rites of Initiation.

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>>52090772
Not the worst actually. The Imperium has so many dubious names that I would be willing to give them a shot before offing them.
>Exorcists (still one of the best chapters though)
>Marines Malevolent
>Blood Drinkers
>Flesh Tearers
>Red Talons
>Death Spectres
>Invaders
>Knights of Blood
>Angels of Damnation
>Black Guard
>Silver Skulls
>Flesh Eaters
Honorable mention goes to the Alphic Hydras.

>>52091206

Not him, but what happens if you have a very successful chapter, one in which their standard levels of recruiting far outpace their losses (They haven't been suffering as many of them for the past century, for whatever reason), and the next time someone takes a headcount, they're way over the Codex Astartes limit.

I assume someone will direct them to split up, but how would something like that work? How do they choose who goes where, and which chapter relics stay with which successor, that kind of thing?

>>52091852
That would be somewhat rare, I think, because as far as I understand a chapter will recruit only when they have need - or they're so split up that no one can keep a proper headcount anyway (aaay Dark Angels)

But in that hypothetical scenario, they might take some of the most recent recruits and split them off into a chapter with a few of the veterans, mass recruiting new Astartes to round out numbers. Chapter relics aren't often shared, but I could imagine the parent chapter creating a few gifts for their new kid.

>>52091852
The other alternative is that the chapter puts itself forward into very high-risk, high glory missions, such as leading crusades. The high losses sustained not only ensure they return to codex standards in short order but could also lead to survivors becoming more experienced than they would otherwise be.

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>>52091852
CRUSAAAAAADE