They later became willing servants of the human empire.

And now the attack on the human empire had begun.

And then back to the capital of the human empire.

Prompt action should eliminate this particular menace and make it possible for you to survive and maintain the human empire.

On the whole, Tucker thought the notion of a quadrant-spanning human empire was probably a bad idea.

I am after something more important than a human empire.

Metal: They represent human empire always ready to conquer, with the help of their advanced weapons and chariots.

But each day also took them farther away from everything the children had ever known-the remnants of the human empire.

"The Galaxy will not, in that case, become a human empire."

Contact was made with the old human empire in Cathay.