Roman legion
Legio I "Isaura Sagitaria" was a "pseudocomitatensis" Roman legion. The legion was probably created by emperor Probus. It is possible that in the beginning it, together with the II and III "Isaura", it was used to defend the Isauria region, The legion campaigned against the tribes of Cilicia. As its name suggests, its legionaries could be used also as archers, an uncommon feature for Roman legions. According to "Notitia Dignitatum", in the beginning of the 5th century the I "Isaura" was under the command of the "Magister Militum per Orientem."