Mo,
Here's a link to get you started. Of course, if you are thinking about State Guards in Twilight: 2000, one has to go back about 15 years. The picture is much sparser back then. However, there are some threads in the archives in which we discuss developments in State Guards in the Twilight: 2000 universe. The general consensus was that you could justify halfway decent light infantry equipment, Vietnam-era weapons, and a few vehicles here and there under select circumstances. Overall, though, the State Guards failed to live up to their potential, albeit for very undrstandable reasons.
http://www.sgaus.org/
Webstral