Editing Sky Serpents (section)

==Legion Organization==
The Sky Serpent legion as a whole has a flexible and interlocking command structure. Individual chapters and companies are designed to be more or less self sufficient, but are not wholly interchangeable. Instead, various specialized formations exist at all levels, from Jaguar Warrior companies in many chapters to specialized chapters, such as the infamous Jade Lion or Ereshkigal Guard.
Independent of such formations, various warrior orders and rites existed. The best known outside the legion is probably the Raven Path, the legion's primary techno-archaeologists, but many other such groups exist, such as the Vulpine Talon, specializing in research and design, or the Threefold Gate, the legion's Librarius.

===The Tzolkin===
Tepictitlan culture regards 20 as the number of completeness, and as such, all squads are notionally of 20 men.
A company has 12 squads of 20 men, as well as a 20 man command squad for a total of 13 squads of 20, 260 men.
There are 20 of these companies in a Tzolkin (chapter), for a total of 5200 marines.  Each Tzolkin is unique, but they tend to fall into several general types.

1 Command Squad, including communications, logisticians, honor Guard, librarian, etc.

4-6 Reaver Squads-- bolt pistol and chain axes is the stereotype. They usually have APCs, but Storm Eagle or Jump Pack insertion is not unknown.
4-6 Tactical Support Squads--these guys have APCs or IFVs, and are armed with Volkites, Flamers, or Meltas. Sometimes rotor cannon.
2-4 Seeker/Vet Squads-- Sternguard vets mounted in an IFV or APC. If they have a heavy weapon, it's got a suspensor Web. Or its a Deathwatch style Frag cannon. Seriously, those bad boys are totally Sky Serpents.
0-2 Devastators-- Typically armed with mobile heavy weapons like Frag or Grav cannon.
0-2 Destroyers-- rad missiles, crowd control
0-2 Heavy Assault-- these are your Terminators and Breachers. Some companies have more of them and are specialized for the purpose.


The white clad death companies stand outside the formation.

Heavy weaponry is generally provided by Armored support, tanks, etc.

There's a few other common company styles, though. There's a first company eq, breachers, recon/artillery/ambush, and Armored companies

===Post Heresy===
They don't quite do successor chapters.  Instead, the pre-heresy structure has been retained and expanded, with new levels of organization being added above the Tzolkin.  Units of 20 Tzolkin are grouped into a Katun, with 20 of those in a Baktun.