RE: Dirtside campaign / FT Traveller

speaking as one of the playtesters/kibbitzers on Imperial Squadrons
I can tell you a few things about it.

1). nothing like whats in IS existed beforehand, except for the never 
published "Imperial Navy Handbook" for Megatraveller.

2). we didnt have near enough time to playtest it properly
as with all the T4 products, deadlines were rushed bigtime.