De velitatione bellica is the conventional Latin title for the Byzantine military treatise on skirmishing and guerrilla-type border warfare, composed circa 970. Its original Greek title is Περὶ Παραδρομῆς (Peri Paradromēs, "On Skirmishing").[1] The original author is unknown but likely to have been a high-ranking army officer close to the Phokas family. The work describes tactics used previously against Muslim opponents but the author notes that due to recent Byzantine successes they might "not find application in the eastern regions at the present time" but might be useful for future campaigns. The author is critical of the bureaucracy of the Constantinople-based government.[citation needed]