Canto II, stanza 20. Here Byron is using an adaptation of a quote from Agricola by the Roman historian Tacitus (c. 30). The original words in the text are Auferre, trucidare, rapere, falsis nominibus imperium; atque, ubi solitudinem faciunt, pacem appellant (To robbery, slaughter, plunder, they give the lying name of empire; they make a wilderness, and call it peace). This has also been reported as Solitudinem faciunt, pacem appellant (They make solitude, which they call peace).https://en.wikiquote.org/wiki/Lord_Byron