From the back cover:
Striker II is the miniature combat rules of 58th century warfare, for use with Traveller: The New Era.
Striker II is more than just rules, it is also an extensive resource of military hardware and organizations - from the jeeps and tracked vehicles of Wilds units to speeders and grav tanks of a Reformation Coalition Marine Brigade.
Striker II provides the full science fiction combat experience with rules on orbital bombardment, drop troops, antimissile fire control, planetary environment, and orbital superiority. Campaign rules allow a sophisticated strategic gaming experience by adding the effects of combat engineers, maintenance, and quality of food and medical care.