Star Wars: Empire at War/Pirate units

The "Pirates" in space across the galaxy and also on land are a united force of all different mercenary individuals who fight for themselves against both rebels and empire, or if one of their Merchant Space docks, cantinas or mercenary outfiters are captured by either forces, they'll help that side by preparing production for tanks or vessels for battle help. You can do this in various skirmish maps.

Pirate soldier
These aren't really "soldiers", but are fighting in groups for the pirate force. Yes, you may find out that they'll debark from their mercenary outfitters, whether captured by rebels or empire or not occupied, they'll attack your guarding troops and enemy forces guarding as well. They pretty much fight for the pirates.

Pirate Missile Soldier
The same characteristics and principle as the pirate troop described above, this time with PLEX rockets. Watch out tanks!

Skiff
Light, fast, repulsor lift vehicle for patrol and garrison duties. Same use as AT-STs and T-2Bs. Use against infantry speeder bikes and Tie-maulers. Keep using against infantry if your playing as Empire.

Swamp speeder
Again, light vehicle with similar uses as the skiff, but a little bit lighter. It's weak with T2-Bs ATSTs, and heavier