Auferre, trucidare, rapere, falsis nominibus imperium; atque, ubi solitudinem faciunt, pacem appellant.
Attributed by Tacitus in Agricola (c. 98)
Translation: To ravage, to slaughter, to usurp under false titles, they call empire; and where they make a desert, they call it peace. — Oxford Revised Translation (at Project Gutenberg) 
Translation: They plunder, they slaughter, and they steal: this they falsely name Empire, and where they make a wasteland, they call it peace. — translation Loeb Classical Library edition
Translation: To plunder, butcher, steal, these things they misname empire: they make a desolation and they call it peace. — translation by William Peterson