The Military Institutions of the Romans (De Re Militari - "Concerning Military Matters") is a treatise by the late Latin writer Flavius Renatus about Roman warfare and military principles as a presentation of methods and practices in use during the height of Rome's power. Renatus emphasized things such as training of soldiers as a disciplined force, orderly strategy, maintenance of supply lines and logistics, quality leadership and use of tactics and even deceit to ensure advantage over the opposition.