Silurian Empire
From Tardis Wiki, the free Doctor Who reference
The Silurian Empire was an empire on Earth which was ruled by the Silurians before the dawn of humanity. Co-existing with the Sea Devils who resided in the seas, the Silurian Empire flourished on the land before the Earth Reptiles were forced into hibernation. (GAME: A Brief History of Space and Time [+]Loading...["A Brief History of Space and Time (game)"])
Stories of the Silurian Empire spread through the universe, with many alien species considering 21st century humanity to be insignificant compared to Silurians. (PROSE: UNIT History [+]Loading...["UNIT History (short story)"])