Star Trek: Armada II is a real-time strategy game, published by Activision in 2001. The sequel to Star Trek: Armada, it featured improved three dimensional graphics as well as more classes of ships. It also added Species 8472 and the Cardassian Union as playable races.
"The Federation stands on the precipice of another major conflict that threatens the fragile peace we have worked so hard to achieve. It's been six months since we successfully dealt with the threat of the Omega Particle. Tensions between the Cardassians and the Klingon Empire are on the rise, and we've just received word of a renewed Borg threat."
Following some complaints about the length of the Armada version, the single-player campaign was altered for this game; now only three races are involved, and each storyline is mostly independent of the others: the Federation must repel a Borg invasion via a new type of transwarp gate, taking the assault into the Delta Quadrant; the Klingons must deal with a resurgent Cardassian military, while the Borg, affected by events in the Federation campaign, must stave off an attack by Species 8472, before combining with the Federation to eliminate this galactic threat.