Skonnan Empire

The Skonnan Empire was an interstellar imperial military dictatorship ruled by the Skonnans. It controlled hundreds of planets, but there was a massive civil war and the empire collapsed. This caused the death of nearly all of the Skonnan's scientists and men of learning. The military gained control of Skonnos, and their technology decayed, leaving them with a broken down fleet of starships. (TV: The Horns of Nimon)