My guess is that there´ll be hastily formed militias, which in turn mature into merc companies.
Force composition will be heavily influenced by 1) distance to terra and 2) realm of origin, meaning that the more the RotS disarmamaent pakt was adhered to, the more haphazard the force composition will be.
In regards of the force composition itself, I´d do that by roles:
- One zombie type of unit as an anchor point, big mech or big tank.
- One scout unit of some kind
- Two striker types of unit
- One missileboat
- Infantry and BA to screen those units.
Sample merc unit creaion table could look like:
Table 1: Distance to Terra.
2-4 RotS (Force Roll: -2)
5-6 Near (Force Roll: +2)
7-9 Intemediate (Force Roll: +1)
10-12 Far (Force Roll: -1)
Table 2: Unit Origin
2-5: RotS (Tech Roll: -4)
6-8: House, adherent (Tech Roll: -0)
9-10: House, non-adherent (Tech Roll: +4)
11-20: Clan (Tech Roll: +2)
Table 3: Force Table
2 1 Zombie, 1 Striker, 1 Scout, 1 Footsoldier
... to ...
12 2 Zombie, 4 Striker, 2 Scout, 2 Missile, 4 Footsoldier
Table 4+ Tech Tables, filled with units, like:
.. (Subtable, Zombies)
11 Gürteltier MBT
12 Atlas