From back of the Amiga game box:
EMPIRE - 'Wargame of the Century' is a game of strategic conquest and empire building. Starting with only a single city in a vast uncharted world, you begin your exploration. As your armies encounter and subdue hostile cities, your production capacity increases. You must decide what each city should produce to best aid your war effort. As your empire increases,you will soon have at your command armies, fighters, and a powerful navy. However, your aspirations to be emperor are not achieved easily. Somewhere in this vast world are opponents who are also attempting to build empires. Eventually your forces will meet, and a life and death struggle of epic proportions will begin. There can only be one winner in this war, and only through exceptional strategic and logistics skills will final victory be yours!