Star Fleet II: Krellan Commander
Star Fleet II: Krellian Commander is an insanely ambitious (for the time) spaceship simulation that puts you in command of a single ship, a fleet, or a full invasion force in the Krellian Fleet. You have full control over your own ship, at first, and eventually, others as you take on the United Galactic Alliance.
Concept
Start your career as a lowly Altern and work your way up to fleet commander as you poke at the UGA and eventually take whole planets from them.