From the back cover:
Faced with the prospect of war with Earth again, the Terranovan leagues set aside their differences and created the Black Talon program, a mission to gather military intelligence on the lost colonies of Mankind. This book ties in with the Heavy Gear 2 computer game from Activision. In addition to the history of the Black Talon regiment, the Field Guide contains the game statistics of the vehicles that are likely to be encountered by Talon teams in their mission.
This sourcebook includes:
A complete history of the Black Talon program.
Full writeups for the 1st Black Talon.
Descriptions and game stats for the Black Talon vehicles and weapons.
Descriptions and game stats for the combat vehicles of the CEF and Caprice.