"Because now the Empire knows exactly where we are."

He was locked in the highest security prison the Empire had ever known.

Could there be people, even bases, on this planet that the Empire doesn't know about?

He looked around the table and managed a wan ghost of the grin all the Empire knew.

And apparently the Empire doesn't know such things are possible.

For two and a half centuries the Empire had known no motivation except survival by exploitation.

What had turned a baby only a few weeks old into the single most destructive force the Empire had ever known?

The whole Empire must know what I have to tell.

We would like to know, therefore, just what the Empire does know.

When it was over, the Empire hadn't known what to do with Silence.