DS campaign system?

I have a vague memory of ground combat game that had rules for linking
it to
an interstellar campaign (was it SPI's StarSoldier?)

Some starships could carry X amount of "troop points".	Planets were
defended
by friendly troop points.  

If an invading starship task force eliminated all defender starships,
they could conduct a planetary invasion.

The idea was to play a couple of representative scenarios which would
simulate the invasion.	The results of a scenario with a few units
would determine how the entire invasion turned out (without having
to play ten thousand scenarios)

One would use the troop points to purchase the units involved in
the scenarios.	Several scenarios could be played, with the units
available for latter scenarios depending on what survived the prior
ones.  For instance one could first play an orbital landing scenario,
then an ambush scenario, then an assault on a planetary base.

Some troop points could be held in reserve, so as to preserve them
for later scenarios.