Like this:
Empire name: Imperium of Man
Physical characteristics: Human
Homeworld name:Terra
Species name: Human
History: The Emperor of Mankind lead Humanity through the Age of Strife, this is the Great Crusade.
Flag(optional):
Population: 500 + Trillion (disputed)
Ships: Dictator Class Destroyer, Luna Class Battleship, Barbarian Class Destroyer, Cobra Class Escorts.