He used spies, he gathered unsavory information, but there was one aspect of this game of empire that he hated.

"The Shadovar do use spies, you know."

He has to use spies, bribes, and threats to locate you, in addition to his wits and cunning.

I'm a city boy who knows how to use spies.

They used spies and agents, filling Kushir soldiers with fear and trembling.

Russia had gathered a wealth of information from Finland using spies and other sources.

The duke used other spies and agents for various other tasks.

The one who does not know to use spies will be defeated.

Romulans, however, are not above using hidden bases, or spies.

If it meant using spies, then they had to be used.