Star Trek: Deep Space Nine, Season 6

Elim Garak:
If you can let your anger subside for a moment, Captain, you will see that they did not die in vain! The Romulans will enter the war!

Benjamin Sisko:
There's no guarantee of that!

Elim Garak:
Oh, but I think there is. You see, when the Tal Shiar finishes examining the wreckage of Vreenak's shuttle, they'll find the burnt remnants of a Cardassian optolithic data rod that somehow miraculously survived the explosion. After painstaking forensic examination, they'll discover that the rod contains a recording of a high level Dominion meeting at which the invasion of Romulus was being planned.

Benjamin Sisko:
And then they will discover that it is a fraud!

Elim Garak:
No, but I don't think that they will! Because any imperfections in the forgery will thought to be as a result of the explosion! So, with a seemingly legitimate rod in one hand, and a dead Senator in the other, I ask you, Captain—what conclusions would you draw?

Benjamin Sisko:
[sighs] That Vreenak obtained the rod on Soukara, and that the Dominion killed him to prevent him from returning to Romulus with it.

Elim Garak:
Precisely. And the more they deny it, the more the Romulans will think that they are guilty because it is exactly what they would have done in their place. [pauses]That's why you came to me. Isn't it, Captain? Because you knew I could do those things that you weren't capable of doing. Well, it worked. And you'll get what you want—a war between the Romulans and the Dominion. And if your conscience is bothering you, you should soothe it with the knowledge that you may have just saved the entire Alpha Quadrant. And all it cost was the life of one Romulan Senator, one criminal, and the self-respect of one Starfleet officer. I don't know about you, but I'd call that a bargain.