Editing Sky Serpents (section)

====Sobek Fusilliers====
The Sky Serpents have never been much for static engagements. This task they delegate customarily to their human Auxiliae. As a result of this practice, there are numerous mortal regiments geared for garrison duty and long, grinding sieges.
Among the most famous are the Sobek Fusilliers. The Sobek Fusilliers are organized into paired companies, infantry companies and artillery companies. The infantry companies are universally equipped with lasrifles and flamers, but their most potent tool is their entrenching shovel.
They make planetfall with prefab defense lines, but once these are set up, the Infantry get to work digging and constructing a system of trenches which will serve as the basis for more complex defense works.
The artillery companies, meanwhile provide cover with relentless bombardment even as their guns are set in protected emplacements. The guns themselves run from rapier mounted field guns, to heavier mortars, up to weapons such as the basilisk and Medusa seige guns and beyond.
The Sobek Fusilliers have a sizable Mechanicum contingent, extending beyond the usual enginseers. Instead, techpriests of Orders Macrotek and Reductor are placed throughout the forces.
Typically, one of the two consuls is a Magus.
This is to ensure that the fortifications constructed are up to mechanicum standard and that the enemy position is levelled with optimal efficiency.
At times, this mechanicum oversight can also mean that heavier and more arcane weapons are brought to bear, including the holy Ordinatus Engines.
Under most circumstances, the Sobek Fusillier Infantry companies adopt a defensive posture. Not for them are the human wave assaults of some similar forces. Instead, they try to get the enemy to come to them, luring them into an assault with false weaknesses and crushing them. Not for nothing is their sigil that of a crocodile.
This said, the Infantry is perfectly capable of assaults, though  the bloody task of mass assaults is usually left for forces such as the Argon Apemen penal legions.

Another common practice is to use the Sobek Fusilliers to draw out or focus an enemy assault, allowing forces of the Sky Serpents to strike elsewhere.
Oddly enough, but perhaps characteristic of the impact of Jade Empire propaganda, this sort of mission is seen as among the most honorable. Because of the nature of such things, the Sobek Fusilliers seldom are told before hand that they are to be a distraction force, so naturally, they assume that honor is theirs.
To the soldiers of the Fusilliers, they are partaking in an age old rite of the mortal warriors, serving the Empire and legion with their steadfast defense just as the human troops called up by Songkulkan during the People's War allowed Xun and the Legion the time they needed to honor the Emperor and thrice-Sainted Faustus by rescuing Malcador and the other legions and buying time for Xun to return and slay the foe, as the legion always will.
Thus the glory of the people and the proletariat is to serve where needed and to stand fast.
They're sort of the logical extreme of the Jade Empire propaganda 'proletariat shield' idea. They have conviction that their sacrifice allows the semi-divine Legion, potentially acting through human regiments like the Thule Rimeguard, to do what it needs to do and through their steadfastness, they reenact the holy actions of the virtuous proletariat of Songkulkan's day. It lets them emulate Faustus, who stood fast on Luna. Just as Faustus told Xun to return to his people and that he would martyr himself to ensure the Emperor's ascension, it is their duty and right to be martyrs to let the legion serve the Empire. (Faustus said no such thing and Xun doesn't say he did. Nor do the scholar-bureaucrats and Legion believe any such thing. But you try telling that to a prole.) 
Of course, having walls to hide behind and big guns does nothing to harm morale.