Latrocinium (from Latin latro, "bandit", ultimately from Greek latron, "pay" or "hire"[1]) was a war not preceded by a formal declaration of war as understood in Roman law; thus guerrilla warfare conducted against Rome was a form of latrocinium.[2] It is typically translated into English as "banditry" or "brigandage", but in antiquity encompassed a wider range of subversive or anti-authoritarian actions, especially slave rebellions organized under charismatic leaders.[3] In designating acts of violence that have ideological motives instead of or in addition to material gain, the modern distinction between terrorism and war may be a more illuminating comparison for the 21st century.[4] The Greek term was leisteia; Plato and Aristotle regarded banditry as a way of life, like fishing or hunting.[5]