Wow, another IG player! Cool! Good to see you!
I too play IG, it's cadian in model, but not cadian in practice. I am in process of building a drop troop army of Ultramar IG. If you want to see what i mean, go into the Work In Progress area and you can see some of them, of if you are there tomorrow you can see them!
A tiny portion of humanity turned its back on mankind in the waning days of the last Golden Age. Over one and a half centuries later, the PHR has emerged from the shadows as an unrecognisable civilisation, its people irrevocably changed. They are no longer simple human beings, they are post-humans - cyborgs.