So it's been a while...
Let's be honest, even as periphery worlds go, Greenwood Station isn't a great place to live. It's bone dry, the dust gets everywhere, the gravity is only a third of Terra's, every now and then a gas giant comes strolling through the sky causing earthquakes and throwing rocks, and some people say the whole place is haunted. Its only real value is that it's close to a lot of other places, and the locals have a clear "no questions asked" policy when it comes to visitors. Still, most of those who visit never stay for long before heading out to greener pastures.
The ones that do, however, tend to be of a certain type...
The House Brand Heroes serve as the planetary militia for Greenwood Station, and all things considered, they do a pretty good job of it. Their machines have been heavily adapted to operate in the low gravity and unique conditions of Greenwood Station, with mods to the myomer systems, vehicle motive systems, fire control computers, and even the munitions they use to get the most out of their environment. This would cripple their machines if they ever took them offworld, but of course they don't. Greenwood is their home.
Their mechs are the most visible of their troops, though they have a whole hodgepodge of other units that usually don't even see the battlefield. Armored trucks are used to scatter remote sensors and decoy reflectors around the battlefield. Swift Wind Scout cars (they fell off a dropship) monitor the sensors and coordinate with a tracked APC that they've cobbled together into a reasonably effective Mobile HQ. Light infantry and maybe a few attack vehicles add extra hitting power, and they can sometimes call in friends of questionable pedigree. It's all very slapdash, but it works.
Unusual for a ramshackle unit bound to a poor periphery world, they even manage a unified paint scheme, more or less. A pristine unit would be dark blue with a red stripe (humanoid battlemechs have it placed on their central upper body, other units are more flexible). But the environment and the limited resources means no unit can ever be pristine for long, so extensive wear is very common.